Reference:1491 - Revision history

Klaudiusz: Remove standalone gallery heading; retain Prince image gallery

2026-09-29T05:34:47Z

Remove standalone gallery heading; retain Prince image gallery

← Older revision		Revision as of 05:34, 29 September 2026
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	See also the [[Reference:prince\|Prince family index]], [[Reference:Movements\|movement reference]], [[Reference:Bracelets\|bracelet & clasp guide]], and [[Reference:Serial-numbers\|serial numbers by year]].		See also the [[Reference:prince\|Prince family index]], [[Reference:Movements\|movement reference]], [[Reference:Bracelets\|bracelet & clasp guide]], and [[Reference:Serial-numbers\|serial numbers by year]].

	~~== Gallery ==~~

	<gallery mode="packed" heights="180">		<gallery mode="packed" heights="180">

Klaudiusz: Deep image, auction-source and anti-slop follow-up

2026-09-29T01:07:12Z

Deep image, auction-source and anti-slop follow-up

← Older revision		Revision as of 01:07, 29 September 2026
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	\| unsold		\| unsold
	\|-		\|-
	~~\| current~~
	~~\| Chrono24 (dealer ask)~~
	~~\| various 1491HS~~
	~~\| USD 44,445~~
	\|}		\|}

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	See also the [[Reference:prince\|Prince family index]], [[Reference:Movements\|movement reference]], [[Reference:Bracelets\|bracelet & clasp guide]], and [[Reference:Serial-numbers\|serial numbers by year]].		See also the [[Reference:prince\|Prince family index]], [[Reference:Movements\|movement reference]], [[Reference:Bracelets\|bracelet & clasp guide]], and [[Reference:Serial-numbers\|serial numbers by year]].

			== Gallery ==

			<gallery mode="packed" heights="180">
			File:Ref 1491 hero.webp\|Whole-watch view, stainless-steel example
			File:Ref 1491 18k-glasgow-1930.webp\|18K example with Glasgow import mark
			File:Ref 1491 dial-layout-detail.webp\|Dial layout with jump-hour aperture and subsidiary seconds
			File:Ref 1491 gold jump-hour detail.webp\|Two-colour 18K 1491HS example
			</gallery>

	== Sources ==		== Sources ==


			* [https://catalog.antiquorum.swiss/en/lots/rolex-lot-146-8 Antiquorum, Rolex Prince Brancard, ref. 1491, 1992 catalogue record]
	* "Rolex Prince 1491HS White + Yellow Gold Jumping Hour", Antiquorum, 1990		* "Rolex Prince 1491HS White + Yellow Gold Jumping Hour", Antiquorum, 1990
	* "Rolex Prince 1491 White Gold Bucherer-Retailed 1945, Case 1578", Antiquorum, 2008, lot 692		* "Rolex Prince 1491 White Gold Bucherer-Retailed 1945, Case 1578", Antiquorum, 2008, lot 692
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	* [https://www.bonhams.com/auction/26683/lot/45/rolex-an-unusual-stainless-steel-manual-wind-jump-hour-wristwatch-prince-jump-hour-ref-1491-circa-1930/ "Rolex Prince Jump Hour, Ref: 1491, Stainless Steel", Bonhams "Watches and Wristwatches", 2021-05-18, sold GBP 6,247.50]		* [https://www.bonhams.com/auction/26683/lot/45/rolex-an-unusual-stainless-steel-manual-wind-jump-hour-wristwatch-prince-jump-hour-ref-1491-circa-1930/ "Rolex Prince Jump Hour, Ref: 1491, Stainless Steel", Bonhams "Watches and Wristwatches", 2021-05-18, sold GBP 6,247.50]
	* [https://www.bonhams.com/auction/25956/lot/6/rolex-an-unusual-stainless-steel-manual-wind-jump-hour-wristwatch-prince-jump-hour-ref-1491-circa-1930/ "Rolex Prince Jump Hour, Ref: 1491, Stainless Steel", Bonhams "Fine Watches", 2020-08-05, est. GBP 6,000-8,000, unsold]		* [https://www.bonhams.com/auction/25956/lot/6/rolex-an-unusual-stainless-steel-manual-wind-jump-hour-wristwatch-prince-jump-hour-ref-1491-circa-1930/ "Rolex Prince Jump Hour, Ref: 1491, Stainless Steel", Bonhams "Fine Watches", 2020-08-05, est. GBP 6,000-8,000, unsold]
			* [https://www.phillips.com/detail/rolex/99894 Phillips Geneva Watch Auction Four, lot 89, silver jump-hour Prince catalogued as ref. 1490]
	* [https://www.sothebys.com/en/auctions/ecatalogue/2016/important-watches-ge1604/lot.135.html "Rolex", Sotheby's "Important Watches" (GE1604), 2016, lot 135]		* [https://www.sothebys.com/en/auctions/ecatalogue/2016/important-watches-ge1604/lot.135.html "Rolex", Sotheby's "Important Watches" (GE1604), 2016, lot 135]
	* "Rolex Prince 1491 Bicolor 1932 Engraved", Artcurial		* "Rolex Prince 1491 Bicolor 1932 Engraved", Artcurial

Admin: Deep correctness and anti-slop audit: Reference 1491

2026-09-22T15:02:06Z

Deep correctness and anti-slop audit: Reference 1491

Show changes

Admin: Batch 30 anti-slop prose audit and heading cleanup

2026-09-22T04:30:36Z

Batch 30 anti-slop prose audit and heading cleanup

← Older revision		Revision as of 04:30, 22 September 2026
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	{{DISPLAYTITLE:Rolex 1491}}		{{DISPLAYTITLE:Rolex 1491}}
	{{#seo:		{{#seo:
	\|title=Rolex 1491 (1930–1945) — Production & Dial Guide \| Rolexopedia		\|title=Rolex 1491 (1930–1945), Production & Dial Guide \| Rolexopedia
	\|description=The Rolex Prince Brancard Jumping Hour 1491 — Rolex's only catalogued rectangular wrist with a heures sautantes display. Digital hour aperture at twelve, minutes around the dial, sub-seconds at six. Aegler shaped movement (Cal. 350 T.S. / 7½′′′ Extra Prima Observatory) plus Aegler-built jump-hour module. Distinct deeper case than the 1490; HS suffix on factory casebacks (F2149HS, F220) on dressy white-gold and bicolor sub-runs. Production 1930–1945.		\|description=The Rolex Prince Brancard Jumping Hour 1491, Rolex's only catalogued rectangular wrist with a heures sautantes display. Digital hour aperture at twelve, minutes around the dial, sub-seconds at six. Aegler shaped movement (Cal. 350 T.S. / 7½′′′ Extra Prima Observatory) plus Aegler-built jump-hour module. Distinct deeper case than the 1490; HS suffix on factory casebacks (F2149HS, F220) on dressy white-gold and bicolor sub-runs. Production 1930–1945.
	\|keywords=Rolex, Prince, 1491, 1491HS, Brancard, Jumping Hour, Heures Sautantes, Aegler, Cal. 350 T.S., Ultra Prima, Bucherer, Beyer, vintage, Art Deco, doctor watch, reference guide		\|keywords=Rolex, Prince, 1491, 1491HS, Brancard, Jumping Hour, Heures Sautantes, Aegler, Cal. 350 T.S., Ultra Prima, Bucherer, Beyer, vintage, Art Deco, doctor watch, reference guide
	\|image=Ref 1491 hero.webp		\|image=Ref 1491 hero.webp
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	<div class="rp-lead">		<div class="rp-lead">
	[[File:Ref 1491 hero.webp\|thumb\|center\|640px\|alt=Rolex Prince 1491 jump-hour Brancard on the wrist, stainless steel, jump-hour aperture at twelve\|Stainless steel 1491, Bonhams London, 21 June 2023, auction 28033 lot 75 — jump-hour aperture at twelve, sub-seconds at six]]		[[File:Ref 1491 hero.webp\|thumb\|center\|640px\|alt=Rolex Prince 1491 jump-hour Brancard on the wrist, stainless steel, jump-hour aperture at twelve\|Stainless steel 1491, Bonhams London, 21 June 2023, auction 28033 lot 75, jump-hour aperture at twelve, sub-seconds at six]]
	</div>		</div>

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	\|-		\|-
	\| movement		\| movement
	\| Aegler shaped, 7½′′′ (or 7′′′) base architecture with jumping-hour module mounted on the standard Prince base — the module is Aegler-built, not sourced from a complication specialist		\| Aegler shaped, 7½′′′ (or 7′′′) base architecture with jumping-hour module mounted on the standard Prince base, the module is Aegler-built, not sourced from a complication specialist
	\|-		\|-
	\| caliber labels		\| caliber labels
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	The Brancard Prince family runs the 971, 1490, and 1491 in parallel through 1930–1945, with the 1862 and other Classic Princes alongside them on a different case shape. Where the 1490 dominated period Rolex advertising and the 971 carried the chronometer-grade marketing, the jumping-hour 1491 appeared less often in the catalogue and in advertising. The 1491 surfaces in modern auctions at roughly the same depth as the platinum 971 (a configuration documented in single-digit examples), and a Watchprosite collector estimates surviving 1491s in the low hundreds, with the dressier 1491HS configurations surfacing once per decade or less.		The Brancard Prince family runs the 971, 1490, and 1491 in parallel through 1930–1945, with the 1862 and other Classic Princes alongside them on a different case shape. Where the 1490 dominated period Rolex advertising and the 971 carried the chronometer-grade marketing, the jumping-hour 1491 appeared less often in the catalogue and in advertising. The 1491 surfaces in modern auctions at roughly the same depth as the platinum 971 (a configuration documented in single-digit examples), and a Watchprosite collector estimates surviving 1491s in the low hundreds, with the dressier 1491HS configurations surfacing once per decade or less.

	Robb Report identifies a ref. 1571 "Railway Prince" with the same jumping-hour complication in a different Prince case form; the attribution is not corroborated by other primary sources and remains unconfirmed. Phillips's 2016 Beyer-signed silver jump-hour Prince is catalogued as ref. 1490, while Antiquorum's similar-layout examples are catalogued as 1491HS — Phillips and Antiquorum disagree on the reference number for visually identical configurations. The differing catalogue numbers remain unresolved. The omission of HS from some accompanying papers may account for part of the confusion, but does not establish that the Phillips attribution is wrong.		Robb Report identifies a ref. 1571 "Railway Prince" with the same jumping-hour complication in a different Prince case form; the attribution is not corroborated by other primary sources and remains unconfirmed. Phillips's 2016 Beyer-signed silver jump-hour Prince is catalogued as ref. 1490, while Antiquorum's similar-layout examples are catalogued as 1491HS, Phillips and Antiquorum disagree on the reference number for visually identical configurations. The differing catalogue numbers remain unresolved. The omission of HS from some accompanying papers may account for part of the confusion, but does not establish that the Phillips attribution is wrong.

	==The jumping-hour mechanism==		==The jumping-hour mechanism==

	[[File:Ref 1491 18k-glasgow-1930.webp\|thumb\|right\|260px\|alt=Rolex Prince 1491 18K Glasgow 1930\|1491 18K yellow gold, Glasgow Import mark 1930 (Bonhams sale 29152 lot 23) — front view shows the jump-hour aperture at twelve and the sub-seconds register at six]]		[[File:Ref 1491 18k-glasgow-1930.webp\|thumb\|right\|260px\|alt=Rolex Prince 1491 18K Glasgow 1930\|1491 18K yellow gold, Glasgow Import mark 1930 (Bonhams sale 29152 lot 23), front view shows the jump-hour aperture at twelve and the sub-seconds register at six]]
	The Aegler shaped-movement family that powered the standard Prince — Cal. 300, Cal. 350, Cal. 7½′′′ T.S. 300 — receives a jumping-hour module on the 1491. The module is Aegler-built, developed in-house instead of sourced from an outside complication specialist such as Audemars Frères, Le Coultre, or one of the period jump-hour module makers like Hahn or Cortébert. It mounts on top of the standard Prince base movement and consists of an hour disc carrying the twelve hour numerals, an instantaneous-jump mechanism that advances the disc one position per hour at the moment the minute hand reaches twelve, and a small aperture cut into the dial at the twelve o'clock position through which one numeral at a time is visible.		The Aegler shaped-movement family that powered the standard Prince, Cal. 300, Cal. 350, Cal. 7½′′′ T.S. 300, receives a jumping-hour module on the 1491. The module is Aegler-built, developed in-house instead of sourced from an outside complication specialist such as Audemars Frères, Le Coultre, or one of the period jump-hour module makers like Hahn or Cortébert. It mounts on top of the standard Prince base movement and consists of an hour disc carrying the twelve hour numerals, an instantaneous-jump mechanism that advances the disc one position per hour at the moment the minute hand reaches twelve, and a small aperture cut into the dial at the twelve o'clock position through which one numeral at a time is visible.

	The module added enough thickness to the standard movement that the 1491 case is deeper than the 1490 case. Case depth is one check when assessing a claimed 1491. A Brancard claimed as a 1491 that has the same case depth as a 1490 is either a transplant (1490 case fitted with a later jumping-hour module) or a misidentified 1490 with a refinished aperture-style dial. The 1491 case is also distinguished by its case-number sequence. F-prefix factory stamps are documented on multiple HS examples (F2149HS at Antiquorum 2008 lot 693, F220 at Bonhams 2024), and the "HS" letters appear on the caseback even when the same letters are absent from accompanying factory papers.		The module added enough thickness to the standard movement that the 1491 case is deeper than the 1490 case. Case depth is one check when assessing a claimed 1491. A Brancard claimed as a 1491 that has the same case depth as a 1490 is either a transplant (1490 case fitted with a later jumping-hour module) or a misidentified 1490 with a refinished aperture-style dial. The 1491 case is also distinguished by its case-number sequence. F-prefix factory stamps are documented on multiple HS examples (F2149HS at Antiquorum 2008 lot 693, F220 at Bonhams 2024), and the "HS" letters appear on the caseback even when the same letters are absent from accompanying factory papers.
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	* Silvered dial with applied Breguet-style minute markers, hour aperture, sub-seconds. Typical on dressier white-gold and bicolor examples.		* Silvered dial with applied Breguet-style minute markers, hour aperture, sub-seconds. Typical on dressier white-gold and bicolor examples.

	[[File:Ref 1491 gold jump-hour detail.webp\|thumb\|right\|250px\|alt=Rolex Prince 1491HS two-color 18K gold jumping hour, Bonhams sale 29152 lot 6\|1491HS two-color 18K gold (yellow + white), Bonhams sale 29152 lot 6, c.1930 — jump-hour aperture at twelve, sub-seconds at six]]		[[File:Ref 1491 gold jump-hour detail.webp\|thumb\|right\|250px\|alt=Rolex Prince 1491HS two-color 18K gold jumping hour, Bonhams sale 29152 lot 6\|1491HS two-color 18K gold (yellow + white), Bonhams sale 29152 lot 6, c.1930, jump-hour aperture at twelve, sub-seconds at six]]
	* Two-tone sector dial with hour aperture and sub-seconds. Late 1930s Art-Deco geometric variants.		* Two-tone sector dial with hour aperture and sub-seconds. Late 1930s Art-Deco geometric variants.
	* Bucherer-double-signed dial. Antiquorum 2008 lot 692, white-gold 1491 with original 1945 Bucherer invoice. The only documented retailer-double on a 1491.		* Bucherer-double-signed dial. Antiquorum 2008 lot 692, white-gold 1491 with original 1945 Bucherer invoice. The only documented retailer-double on a 1491.
Line 243:		Line 243:
	== Related references ==		== Related references ==

	* [[Reference:1527\|Prince 1527]] — 1930–1945		* [[Reference:1527\|Prince 1527]], 1930–1945
	* [[Reference:1490\|Prince 1490]] — 1928–1945		* [[Reference:1490\|Prince 1490]], 1928–1945
	* [[Reference:1862\|Prince 1862]] — 1928–1942		* [[Reference:1862\|Prince 1862]], 1928–1942
	* [[Reference:971\|Prince 971]] — Brancard Art-Deco (1928–1938)		* [[Reference:971\|Prince 971]], Brancard Art-Deco (1928–1938)
	* [[Reference:1343\|Prince 1343]] — Classic Rectangular (1928–1935)		* [[Reference:1343\|Prince 1343]], Classic Rectangular (1928–1935)
	* [[Reference:3361\|Prince 3361]]		* [[Reference:3361\|Prince 3361]]

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	* [https://www.sothebys.com/en/auctions/ecatalogue/2016/important-watches-ge1604/lot.135.html "Rolex", Sotheby's "Important Watches" (GE1604), 2016, lot 135]		* [https://www.sothebys.com/en/auctions/ecatalogue/2016/important-watches-ge1604/lot.135.html "Rolex", Sotheby's "Important Watches" (GE1604), 2016, lot 135]
	* "Rolex Prince 1491 Bicolor 1932 Engraved", Artcurial (no public catalog URL located)		* "Rolex Prince 1491 Bicolor 1932 Engraved", Artcurial (no public catalog URL located)
	* "Prince personal journey — 1491 Jumping Hour module thicker", Watchprosite		* "Prince personal journey, 1491 Jumping Hour module thicker", Watchprosite
	* "Rolex Prince Jumping Hour — population proxy", Watchprosite, 2020		* "Rolex Prince Jumping Hour, population proxy", Watchprosite, 2020
	* "Rolex Prince 1491 — proposed conceptual ancestor of the 1945 Datejust window", rolexencyclopedie.nl		* "Rolex Prince 1491, proposed conceptual ancestor of the 1945 Datejust window", rolexencyclopedie.nl
	* [https://www.rolexmagazine.com/2017/05/the-complete-history-of-rolex-prince.html Jake Ehrlich, "The Complete History of the Rolex Prince", Rolex Magazine, 2017-05]		* [https://www.rolexmagazine.com/2017/05/the-complete-history-of-rolex-prince.html Jake Ehrlich, "The Complete History of the Rolex Prince", Rolex Magazine, 2017-05]
	* [https://quillandpad.com/2019/04/09/the-golden-age-of-rolex-movements-part-i-sowing-the-seeds-of-greatness/ Tim Mosso, "The Golden Age of Rolex Movements Part I", Quill & Pad, 2019-04-09]		* [https://quillandpad.com/2019/04/09/the-golden-age-of-rolex-movements-part-i-sowing-the-seeds-of-greatness/ Tim Mosso, "The Golden Age of Rolex Movements Part I", Quill & Pad, 2019-04-09]

Admin: Enrichment pass: resolved 6 bare Sources citations to real Bonhams/Sothebys URLs (verified via API search), expanded Auction record table with precise per-lot rows, added 4th image (dial-layout-detail, Bonhams 2021 steel example) to meet the 4-image standard

2026-09-17T04:54:32Z

Enrichment pass: resolved 6 bare Sources citations to real Bonhams/Sothebys URLs (verified via API search), expanded Auction record table with precise per-lot rows, added 4th image (dial-layout-detail, Bonhams 2021 steel example) to meet the 4-image standard

← Older revision		Revision as of 04:54, 17 September 2026
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	==Dial layout==		==Dial layout==

			[[File:Ref 1491 dial-layout-detail.webp\|thumb\|right\|250px\|alt=Rolex Prince 1491 dial straight-on, showing the red digital hour aperture at twelve, minute numerals around the perimeter, and sub-seconds at six\|Straight-on view of the three-zone layout: digital hour aperture at twelve (reading "4" in red), minute numerals around the perimeter, sub-seconds at six. Stainless steel example, Bonhams 2021.]]
	Where the standard duo-dial Prince reads across two zones, the 1491 dial adds a third. The hours appear in a small square or circular aperture at twelve o'clock, displaying one numeral at a time as the disc advances. The minutes track around the perimeter of the dial, marked at standard five-minute intervals or in finer detail depending on dial variant. The sub-seconds register sits at six o'clock, the same position as on the standard duo-dial Prince. The result is a dial that reads less intuitively than a conventional analog watch. Three discrete zones must be combined to register the time, and the Watchprosite collector record describes the layout bluntly: "very difficult to actually tell the time."		Where the standard duo-dial Prince reads across two zones, the 1491 dial adds a third. The hours appear in a small square or circular aperture at twelve o'clock, displaying one numeral at a time as the disc advances. The minutes track around the perimeter of the dial, marked at standard five-minute intervals or in finer detail depending on dial variant. The sub-seconds register sits at six o'clock, the same position as on the standard duo-dial Prince. The result is a dial that reads less intuitively than a conventional analog watch. Three discrete zones must be combined to register the time, and the Watchprosite collector record describes the layout bluntly: "very difficult to actually tell the time."

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	\| CHF 10,000		\| CHF 10,000
	\|-		\|-
	\| 2019		\| 2019-05-21
	\| Bonhams		\| Bonhams (lot 25395/66)
	\| 9K yellow, 1930		\| 9K yellow, Glasgow import 1930
	\| GBP 4,812		\| GBP 4,812.50
			\|-
			\| 2020-08-05
			\| Bonhams (lot 25956/6)
			\| stainless steel
			\| est. GBP 6,000–8,000, unsold
	\|-		\|-
	\| 2020		\| 2020
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	\| USD 11,875		\| USD 11,875
	\|-		\|-
	\| ~~various~~		\| 2021-05-18
	\| Bonhams		\| Bonhams (lot 26683/45)
	\| stainless		\| stainless steel
	\| GBP 6,~~247–12~~,160		\| GBP 6,247.50
			\|-
			\| 2023-06-21
			\| Bonhams (lot 28033/75)
			\| stainless steel
			\| GBP 12,160
			\|-
			\| 2024-06-19
			\| Bonhams (lot 29152/23)
			\| 18K yellow gold, Glasgow import 1930
			\| est. GBP 8,000–12,000
	\|-		\|-
	\| 2024		\| 2024-06-19
	\| Bonhams		\| Bonhams (lot 29152/6)
	\| 1491HS two-color 18K, case F220		\| 1491HS two-color 18K, case F220
	\| est. GBP 10,000–15,000		\| est. GBP 10,000–15,000, unsold
	\|-		\|-
	\| various		\| various
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	\| bicolor with 1932 caseback engraving		\| bicolor with 1932 caseback engraving
	\| EUR 27,028		\| EUR 27,028
			\|-
			\| 2016
			\| Sotheby's (GE1604, lot 135)
			\| unsold, configuration not detailed in the retrieved listing
			\| unsold
	\|-		\|-
	\| current		\| current
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	\|}		\|}

	The 1491 commands a 2–4× premium over a comparable steel or yellow-gold 1490, and a 5–10× premium in white-gold or bicolor HS form. Phillips Geneva carries no documented 1491 lots in their public archive. Auction representation runs through Antiquorum and Bonhams, with Christie's, Artcurial, and Tajan filling out the European tier. Sotheby's GE1604 lot 135 from 2016 (an unsold 1491 ~~estimate) is cited via aggregator only and lacks direct catalog documentation in the public record~~.		The 1491 commands a 2–4× premium over a comparable steel or yellow-gold 1490, and a 5–10× premium in white-gold or bicolor HS form. Phillips Geneva carries no documented 1491 lots in their public archive. Auction representation runs through Antiquorum and Bonhams, with Christie's, Artcurial, and Tajan filling out the European tier. Sotheby's GE1604 lot 135 from 2016 documents an unsold 1491.


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	* "Rolex Prince 1491HS White + Yellow Gold Jumping Hour", Antiquorum, 1990		* "Rolex Prince 1491HS White + Yellow Gold Jumping Hour", Antiquorum, 1990 (no public catalog URL located)
	* "Rolex Prince 1491 White Gold Bucherer-Retailed 1945, Case 1578", Antiquorum, 2008		* "Rolex Prince 1491 White Gold Bucherer-Retailed 1945, Case 1578", Antiquorum, 2008, lot 692 (no public catalog URL located)
	* "Rolex Prince 1491HS White Gold, Case F2149HS", Antiquorum, 2008		* "Rolex Prince 1491HS White Gold, Case F2149HS", Antiquorum, 2008, lot 693 (no public catalog URL located)
	* "Rolex Prince 1491HS 18K Bicolor Observatory 1935", Christie's, 2020		* "Rolex Prince 1491HS 18K Bicolor Observatory 1935", Christie's, 2020, lot 130 (no public catalog URL located)
	* "Rolex Prince 1491HS 18K Bicolor", Christie's, 2018		* "Rolex Prince 1491HS 18K Bicolor", Christie's, 2018, lot 113 (no public catalog URL located)
	* "Rolex Prince 1491HS Two-~~Color~~ 18K Case F220", Bonhams, 2024		* [https://www.bonhams.com/auction/29152/lot/6/rolex-a-rare-and-unusual-two-colour-18k-gold-manual-wind-jump-hour-wristwatch-prince-jump-hour-ref-1491hs-circa-1930/ "Rolex Prince Jump Hour, Ref: 1491HS, Two-Colour 18K Gold, Case F220", Bonhams "Fine Watches", 2024-06-19, est. GBP 10,000-15,000, unsold]
	* "Rolex Prince 1491 9K ~~Yellow~~ Gold 1930", Bonhams, 2019		* [https://www.bonhams.com/auction/25395/lot/66/rolex-a-rare-9k-gold-manual-wind-jump-hour-wristwatch-prince-ref-1491-glasgow-import-mark-for-1930/ "Rolex Prince, Ref: 1491, 9K Gold, Glasgow Import Mark for 1930", Bonhams "Watches and Wristwatches", 2019-05-21, sold GBP 4,812.50]
	* "Rolex Prince 1491 Bicolor 1932 Engraved", Artcurial		* [https://www.bonhams.com/auction/29152/lot/23/rolex-a-fine-and-rare-18k-gold-manual-wind-jump-hour-wristwatch-prince-jump-hour-ref-1491-glasgow-import-mark-for-1930/ "Rolex Prince Jump Hour, Ref: 1491, 18K Gold, Glasgow Import Mark for 1930", Bonhams "Fine Watches", 2024-06-19, est. GBP 8,000-12,000]
			* [https://www.bonhams.com/auction/28033/lot/75/rolex-a-rare-and-unusual-stainless-steel-manual-wind-jump-hour-wristwatch-prince-jump-hour-ref-1491-circa-1930/ "Rolex Prince Jump Hour, Ref: 1491, Stainless Steel", Bonhams "Fine Watches", 2023-06-21, sold GBP 12,160]
			* [https://www.bonhams.com/auction/26683/lot/45/rolex-an-unusual-stainless-steel-manual-wind-jump-hour-wristwatch-prince-jump-hour-ref-1491-circa-1930/ "Rolex Prince Jump Hour, Ref: 1491, Stainless Steel", Bonhams "Watches and Wristwatches", 2021-05-18, sold GBP 6,247.50]
			* [https://www.bonhams.com/auction/25956/lot/6/rolex-an-unusual-stainless-steel-manual-wind-jump-hour-wristwatch-prince-jump-hour-ref-1491-circa-1930/ "Rolex Prince Jump Hour, Ref: 1491, Stainless Steel", Bonhams "Fine Watches", 2020-08-05, est. GBP 6,000-8,000, unsold]
			* [https://www.sothebys.com/en/auctions/ecatalogue/2016/important-watches-ge1604/lot.135.html "Rolex", Sotheby's "Important Watches" (GE1604), 2016, lot 135]
			* "Rolex Prince 1491 Bicolor 1932 Engraved", Artcurial (no public catalog URL located)
	* "Prince personal journey — 1491 Jumping Hour module thicker", Watchprosite		* "Prince personal journey — 1491 Jumping Hour module thicker", Watchprosite
	* "Rolex Prince Jumping Hour — population proxy", Watchprosite, 2020		* "Rolex Prince Jumping Hour — population proxy", Watchprosite, 2020

Klaudiusz: Image: strip hammer price from lead caption per hard rule 10 (price belongs in Auction record, not intro)

2026-09-13T17:22:23Z

Image: strip hammer price from lead caption per hard rule 10 (price belongs in Auction record, not intro)

← Older revision		Revision as of 17:22, 13 September 2026
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	<div class="rp-lead">		<div class="rp-lead">
	[[File:Ref 1491 hero.webp\|thumb\|center\|640px\|alt=Rolex Prince 1491 jump-hour Brancard on the wrist, stainless steel, jump-hour aperture at twelve\|Stainless steel 1491, Bonhams London 21 June 2023, auction 28033 lot 75~~, sold GBP 12,160~~ — jump-hour aperture at twelve, sub-seconds at six]]		[[File:Ref 1491 hero.webp\|thumb\|center\|640px\|alt=Rolex Prince 1491 jump-hour Brancard on the wrist, stainless steel, jump-hour aperture at twelve\|Stainless steel 1491, Bonhams London, 21 June 2023, auction 28033 lot 75 — jump-hour aperture at twelve, sub-seconds at six]]
	</div>		</div>

Klaudiusz: Image: swap lead hero for a genuine landscape photo (Bonhams steel 1491, auction 28033 lot 75); relocate former hero (1491HS gold example) into Dial layout

2026-09-13T17:21:54Z

Image: swap lead hero for a genuine landscape photo (Bonhams steel 1491, auction 28033 lot 75); relocate former hero (1491HS gold example) into Dial layout

← Older revision		Revision as of 17:21, 13 September 2026
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	\|keywords=Rolex, Prince, 1491, 1491HS, Brancard, Jumping Hour, Heures Sautantes, Aegler, Cal. 350 T.S., Ultra Prima, Bucherer, Beyer, vintage, Art Deco, doctor watch, reference guide		\|keywords=Rolex, Prince, 1491, 1491HS, Brancard, Jumping Hour, Heures Sautantes, Aegler, Cal. 350 T.S., Ultra Prima, Bucherer, Beyer, vintage, Art Deco, doctor watch, reference guide
	\|image=Ref 1491 hero.webp		\|image=Ref 1491 hero.webp
	\|image_alt=Rolex Prince ~~1491HS two~~-~~color 18K gold jumping~~ hour		\|image_alt=Rolex Prince 1491 jump-hour Brancard on the wrist, stainless steel, jump-hour aperture at twelve
	\|type=Article		\|type=Article
	\|og_type=article		\|og_type=article
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	<div class="rp-lead">		<div class="rp-lead">
	[[File:Ref 1491 hero.webp\|thumb\|center\|640px\|alt=~~1491HS two~~-~~color 18K gold (Bonhams sale 29152 lot 6~~, ~~c.1930) —~~ jump-hour aperture at twelve, ~~sub-seconds at six\|1491HS two-color 18K gold (~~Bonhams ~~sale 29152~~ lot 6, ~~c.1930)~~ — jump-hour aperture at twelve, sub-seconds at six]]		[[File:Ref 1491 hero.webp\|thumb\|center\|640px\|alt=Rolex Prince 1491 jump-hour Brancard on the wrist, stainless steel, jump-hour aperture at twelve\|Stainless steel 1491, Bonhams London 21 June 2023, auction 28033 lot 75, sold GBP 12,160 — jump-hour aperture at twelve, sub-seconds at six]]
	</div>		</div>

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	* Silvered dial with painted Arabic minute track, hour aperture at twelve, sub-seconds at six. The most common configuration on 9K and 18K examples.		* Silvered dial with painted Arabic minute track, hour aperture at twelve, sub-seconds at six. The most common configuration on 9K and 18K examples.
	* Silvered dial with applied Breguet-style minute markers, hour aperture, sub-seconds. Typical on dressier white-gold and bicolor examples.		* Silvered dial with applied Breguet-style minute markers, hour aperture, sub-seconds. Typical on dressier white-gold and bicolor examples.

			[[File:Ref 1491 gold jump-hour detail.webp\|thumb\|right\|250px\|alt=Rolex Prince 1491HS two-color 18K gold jumping hour, Bonhams sale 29152 lot 6\|1491HS two-color 18K gold (yellow + white), Bonhams sale 29152 lot 6, c.1930 — jump-hour aperture at twelve, sub-seconds at six]]
	* Two-tone sector dial with hour aperture and sub-seconds. Late 1930s Art-Deco geometric variants.		* Two-tone sector dial with hour aperture and sub-seconds. Late 1930s Art-Deco geometric variants.
	* Bucherer-double-signed dial. Antiquorum 2008 lot 692, white-gold 1491 with original 1945 Bucherer invoice. The only documented retailer-double on a 1491.		* Bucherer-double-signed dial. Antiquorum 2008 lot 692, white-gold 1491 with original 1945 Bucherer invoice. The only documented retailer-double on a 1491.

Admin: Prose review: remove research commentary, inflated claims and repetitive phrasing

2026-09-12T04:27:45Z

Prose review: remove research commentary, inflated claims and repetitive phrasing

← Older revision		Revision as of 04:27, 12 September 2026
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	</div>		</div>

	The 1491 is the Brancard Jumping Hour Prince — Rolex's only catalogued rectangular ~~wrist~~ with a heures sautantes display, produced from 1930 into the mid-1940s. The hours read through a digital aperture at twelve o'clock, the minutes track around the dial, and the sub-seconds register sits at six. The case is a flared Brancard form, visually similar to the 1490 but slightly thicker because the jump-hour module added depth to the standard Prince movement architecture. That dimensional difference is the single most reliable authentication anchor. A 1491 case is deeper than a 1490 case, and the deeper case carries a distinct case-number sequence, often stamped with an explicit "HS" suffix (Heures Sautantes) on the inside of the caseback. The complication earned the watch the "1491HS" designation in dressy white-gold and bicolor sub-runs, with factory case stamps like F2149HS and F220 confirming the suffix is applied at the case level, a ~~factory-stamping-stage~~ marking ~~that~~ auction ~~catalogs simply carry forward~~. The watch was commercially short-lived. Readers found the jumping-hour layout difficult to interpret. The Depression and Rolex's own Oyster Perpetual marketing absorbed catalog momentum, and the manufacturing complexity discouraged sustained production. Surviving examples are scarce; collector reports place the surfaced population in the low hundreds, with public auction examples surfacing roughly once per decade for the rarest configurations.		The 1491 is the Brancard Jumping Hour Prince, Rolex's only catalogued rectangular wristwatch with a heures sautantes display, produced from 1930 into the mid-1940s. The hours read through a digital aperture at twelve o'clock, the minutes track around the dial, and the sub-seconds register sits at six. The case is a flared Brancard form, visually similar to the 1490 but slightly thicker because the jump-hour module added depth to the standard Prince movement architecture. That dimensional difference is the single most reliable authentication anchor. A 1491 case is deeper than a 1490 case, and the deeper case carries a distinct case-number sequence, often stamped with an explicit "HS" suffix (Heures Sautantes) on the inside of the caseback. The complication earned the watch the "1491HS" designation in dressy white-gold and bicolor sub-runs, with factory case stamps like F2149HS and F220 confirming the suffix is applied at the case level, a marking carried forward into auction catalogues. The watch was commercially short-lived. Readers found the jumping-hour layout difficult to interpret. The Depression and Rolex's own Oyster Perpetual marketing absorbed catalog momentum, and the manufacturing complexity discouraged sustained production. Surviving examples are scarce; collector reports place the surfaced population in the low hundreds, with public auction examples surfacing roughly once per decade for the rarest configurations.


Line 98:		Line 98:
	==Where it sits in the line==		==Where it sits in the line==

	The 1491 launched in 1930 as the ~~complication~~-~~bearing~~ companion to the standard 1490 Brancard. The two references share the flared Art-Deco rectangular case shape and the same Aegler shaped-movement family at the architectural base, but the 1491 carries a jumping-hour module mounted on top of the standard Prince movement. The module added enough mechanical thickness that the 1491 case had to be deepened to accommodate it. Rolex gave the 1491 its own case-number sequence for cases fitted with the module, and on the dressier white-gold and bicolor sub-runs the casebacks were stamped with an explicit "HS" suffix (Heures Sautantes). ~~The~~ Watchprosite collector ~~record summarises~~ the ~~architecture cleanly~~: the HS module is "slightly thicker than the regular Prince movement and thus had a special case number, and most had the letters HS in the reference number."		The 1491 launched in 1930 as the jumping-hour companion to the standard 1490 Brancard. The two references share the flared Art-Deco rectangular case shape and the same Aegler shaped-movement family at the architectural base, but the 1491 carries a jumping-hour module mounted on top of the standard Prince movement. The module added enough mechanical thickness that the 1491 case had to be deepened to accommodate it. Rolex gave the 1491 its own case-number sequence for cases fitted with the module, and on the dressier white-gold and bicolor sub-runs the casebacks were stamped with an explicit "HS" suffix (Heures Sautantes). A Watchprosite collector describes the added depth: the HS module is "slightly thicker than the regular Prince movement and thus had a special case number, and most had the letters HS in the reference number."

	The Brancard Prince family runs the 971, 1490, and 1491 in parallel through 1930–1945, with the 1862 and other Classic Princes alongside them on a different case shape. Where the 1490 dominated period Rolex advertising and the 971 carried the chronometer-grade marketing, the 1491 ~~was a complication showcase — technically distinguished, rare~~ in the ~~catalog,~~ and ~~never marketed at the same volume. Two auction-record signals corroborate the short production~~. The 1491 surfaces in modern auctions at roughly the same depth as the platinum 971 (a configuration documented in single-digit examples), and ~~the population proxy from~~ Watchprosite ~~places~~ surviving 1491s in the low hundreds, with the dressier 1491HS configurations surfacing once per decade or less.		The Brancard Prince family runs the 971, 1490, and 1491 in parallel through 1930–1945, with the 1862 and other Classic Princes alongside them on a different case shape. Where the 1490 dominated period Rolex advertising and the 971 carried the chronometer-grade marketing, the jumping-hour 1491 appeared less often in the catalogue and in advertising. The 1491 surfaces in modern auctions at roughly the same depth as the platinum 971 (a configuration documented in single-digit examples), and a Watchprosite collector estimates surviving 1491s in the low hundreds, with the dressier 1491HS configurations surfacing once per decade or less.

	~~A possible sibling reference deserves naming carefully.~~ Robb Report identifies a ref. 1571 "Railway Prince" with the same jumping-hour complication in a different Prince case form; the attribution is not corroborated by other primary sources and ~~should be treated as an open lead~~. Phillips's 2016 Beyer-signed silver jump-hour Prince is catalogued as ref. 1490, while Antiquorum's similar-layout examples are catalogued as 1491HS — Phillips and Antiquorum disagree on the reference number for visually identical configurations. The ~~most defensible reading is that any Brancard Prince with the jumping-hour layout is a 1491 (with~~ HS ~~suffix on~~ the ~~dressier sub-runs)~~, ~~and~~ the Phillips ~~1490~~ attribution is ~~a catalog reading-from-paperwork-only ambiguity stemming from the HS-on-caseback-but-not-on-papers convention~~.		Robb Report identifies a ref. 1571 "Railway Prince" with the same jumping-hour complication in a different Prince case form; the attribution is not corroborated by other primary sources and remains unconfirmed. Phillips's 2016 Beyer-signed silver jump-hour Prince is catalogued as ref. 1490, while Antiquorum's similar-layout examples are catalogued as 1491HS — Phillips and Antiquorum disagree on the reference number for visually identical configurations. The differing catalogue numbers remain unresolved. The omission of HS from some accompanying papers may account for part of the confusion, but does not establish that the Phillips attribution is wrong.

	==The jumping-hour mechanism==		==The jumping-hour mechanism==
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	The Aegler shaped-movement family that powered the standard Prince — Cal. 300, Cal. 350, Cal. 7½′′′ T.S. 300 — receives a jumping-hour module on the 1491. The module is Aegler-built, developed in-house instead of sourced from an outside complication specialist such as Audemars Frères, Le Coultre, or one of the period jump-hour module makers like Hahn or Cortébert. It mounts on top of the standard Prince base movement and consists of an hour disc carrying the twelve hour numerals, an instantaneous-jump mechanism that advances the disc one position per hour at the moment the minute hand reaches twelve, and a small aperture cut into the dial at the twelve o'clock position through which one numeral at a time is visible.		The Aegler shaped-movement family that powered the standard Prince — Cal. 300, Cal. 350, Cal. 7½′′′ T.S. 300 — receives a jumping-hour module on the 1491. The module is Aegler-built, developed in-house instead of sourced from an outside complication specialist such as Audemars Frères, Le Coultre, or one of the period jump-hour module makers like Hahn or Cortébert. It mounts on top of the standard Prince base movement and consists of an hour disc carrying the twelve hour numerals, an instantaneous-jump mechanism that advances the disc one position per hour at the moment the minute hand reaches twelve, and a small aperture cut into the dial at the twelve o'clock position through which one numeral at a time is visible.

	The module added enough thickness to the standard movement that the 1491 case is deeper than the 1490 case. ~~That dimensional difference~~ is ~~the canonical authentication tell~~. A Brancard claimed as a 1491 that has the same case depth as a 1490 is either a transplant (1490 case fitted with a later jumping-hour module) or a misidentified 1490 with a refinished aperture-style dial. The 1491 case is also distinguished by its case-number sequence. F-prefix factory stamps are documented on multiple HS examples (F2149HS at Antiquorum 2008 lot 693, F220 at Bonhams 2024), and the "HS" letters appear on the caseback even when the same letters are absent from accompanying factory papers.		The module added enough thickness to the standard movement that the 1491 case is deeper than the 1490 case. Case depth is one check when assessing a claimed 1491. A Brancard claimed as a 1491 that has the same case depth as a 1490 is either a transplant (1490 case fitted with a later jumping-hour module) or a misidentified 1490 with a refinished aperture-style dial. The 1491 case is also distinguished by its case-number sequence. F-prefix factory stamps are documented on multiple HS examples (F2149HS at Antiquorum 2008 lot 693, F220 at Bonhams 2024), and the "HS" letters appear on the caseback even when the same letters are absent from accompanying factory papers.

	A service-untouched 1491 typically shows one of three documented failure modes. The jump impulse spring weakens with age and produces a "lazy" disc advance, the disc rotating partially instead of snapping cleanly to the next numeral. The disc retention pawl wears at the impulse face and produces hour-disc jitter under wrist movement. The dial aperture wears at its mounting points and the disc misaligns with the aperture window, showing fragments of two numerals simultaneously. A 1491 that "sets time but the hour disc disengages immediately" points to broken impulse spring engagement, a known and correctable service issue.		A service-untouched 1491 typically shows one of three documented failure modes. The jump impulse spring weakens with age and produces a "lazy" disc advance, the disc rotating partially instead of snapping cleanly to the next numeral. The disc retention pawl wears at the impulse face and produces hour-disc jitter under wrist movement. The dial aperture wears at its mounting points and the disc misaligns with the aperture window, showing fragments of two numerals simultaneously. A 1491 that "sets time but the hour disc disengages immediately" points to broken impulse spring engagement, a known and correctable service issue.
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	==The Datejust precedent claim==		==The Datejust precedent claim==

	A recurring claim in the Prince literature reads the 1491's hour aperture as the conceptual ancestor of the 1945 Datejust window. Jake Ehrlich (Rolex Magazine) and rolexencyclopedie.nl independently propose the lineage~~. The argument is structural~~. Both designs ~~cut a window into the dial, both~~ display a single value at a ~~time through the~~ window~~, and both rely on~~ a disc ~~that~~ the movement ~~advances automatically~~. The connection is plausible but not corroborated by primary Rolex documentation. The Datejust window is conventionally credited to a separate development thread within Rolex's Perpetual research, unconnected to the Prince's jumping-hour module, and the lineage claim remains editorial speculation across two sources.		A recurring claim in the Prince literature reads the 1491's hour aperture as the conceptual ancestor of the 1945 Datejust window. Jake Ehrlich (Rolex Magazine) and rolexencyclopedie.nl independently propose the lineage. Both designs display a single value through a dial window using a disc advanced by the movement. The connection is plausible but not corroborated by primary Rolex documentation. The Datejust window is conventionally credited to a separate development thread within Rolex's Perpetual research, unconnected to the Prince's jumping-hour module, and the lineage claim remains editorial speculation across two sources.

	==Auction record==		==Auction record==

Klaudiusz: Fact audit: correct 692/693 lot conflation (Bucherer/1945 vs F2149HS case stamp are two different watches)

2026-09-07T13:26:11Z

Fact audit: correct 692/693 lot conflation (Bucherer/1945 vs F2149HS case stamp are two different watches)

← Older revision		Revision as of 13:26, 7 September 2026
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	\|-		\|-
	\| price band (hammer)		\| price band (hammer)
	\| GBP 4,812 (9K yellow, Bonhams 2019) → GBP 6,247–12,160 (stainless, Bonhams) → CHF 10,000 (Christie's Geneva 2018) → USD 11,875 (Christie's NY 2020) → CHF 17,825–18,400 (Antiquorum HS 1997–2000) → EUR 27,028 (Artcurial 1932 bicolor) → CHF 34,500 (Antiquorum 1990 white+yellow HS) → CHF 44,000–50,000 estimate (Antiquorum 2008 white-gold HS ~~pair~~). Dealer ask USD 44,445 (Chrono24) corroborates the high end		\| GBP 4,812 (9K yellow, Bonhams 2019) → GBP 6,247–12,160 (stainless, Bonhams) → CHF 10,000 (Christie's Geneva 2018) → USD 11,875 (Christie's NY 2020) → CHF 17,825–18,400 (Antiquorum HS 1997–2000) → EUR 27,028 (Artcurial 1932 bicolor) → CHF 34,500 (Antiquorum 1990 white+yellow HS) → CHF 44,000–50,000 estimate (Antiquorum 2008 white-gold pair, lot 693 HS-cased). Dealer ask USD 44,445 (Chrono24) corroborates the high end
	\|}		\|}

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	The Aegler shaped-movement family that powered the standard Prince — Cal. 300, Cal. 350, Cal. 7½′′′ T.S. 300 — receives a jumping-hour module on the 1491. The module is Aegler-built, developed in-house instead of sourced from an outside complication specialist such as Audemars Frères, Le Coultre, or one of the period jump-hour module makers like Hahn or Cortébert. It mounts on top of the standard Prince base movement and consists of an hour disc carrying the twelve hour numerals, an instantaneous-jump mechanism that advances the disc one position per hour at the moment the minute hand reaches twelve, and a small aperture cut into the dial at the twelve o'clock position through which one numeral at a time is visible.		The Aegler shaped-movement family that powered the standard Prince — Cal. 300, Cal. 350, Cal. 7½′′′ T.S. 300 — receives a jumping-hour module on the 1491. The module is Aegler-built, developed in-house instead of sourced from an outside complication specialist such as Audemars Frères, Le Coultre, or one of the period jump-hour module makers like Hahn or Cortébert. It mounts on top of the standard Prince base movement and consists of an hour disc carrying the twelve hour numerals, an instantaneous-jump mechanism that advances the disc one position per hour at the moment the minute hand reaches twelve, and a small aperture cut into the dial at the twelve o'clock position through which one numeral at a time is visible.

	The module added enough thickness to the standard movement that the 1491 case is deeper than the 1490 case. That dimensional difference is the canonical authentication tell. A Brancard claimed as a 1491 that has the same case depth as a 1490 is either a transplant (1490 case fitted with a later jumping-hour module) or a misidentified 1490 with a refinished aperture-style dial. The 1491 case is also distinguished by its case-number sequence. F-prefix factory stamps are documented on multiple HS examples (F2149HS at Antiquorum 2008 lot ~~692~~, F220 at Bonhams 2024), and the "HS" letters appear on the caseback even when the same letters are absent from accompanying factory papers.		The module added enough thickness to the standard movement that the 1491 case is deeper than the 1490 case. That dimensional difference is the canonical authentication tell. A Brancard claimed as a 1491 that has the same case depth as a 1490 is either a transplant (1490 case fitted with a later jumping-hour module) or a misidentified 1490 with a refinished aperture-style dial. The 1491 case is also distinguished by its case-number sequence. F-prefix factory stamps are documented on multiple HS examples (F2149HS at Antiquorum 2008 lot 693, F220 at Bonhams 2024), and the "HS" letters appear on the caseback even when the same letters are absent from accompanying factory papers.

	A service-untouched 1491 typically shows one of three documented failure modes. The jump impulse spring weakens with age and produces a "lazy" disc advance, the disc rotating partially instead of snapping cleanly to the next numeral. The disc retention pawl wears at the impulse face and produces hour-disc jitter under wrist movement. The dial aperture wears at its mounting points and the disc misaligns with the aperture window, showing fragments of two numerals simultaneously. A 1491 that "sets time but the hour disc disengages immediately" points to broken impulse spring engagement, a known and correctable service issue.		A service-untouched 1491 typically shows one of three documented failure modes. The jump impulse spring weakens with age and produces a "lazy" disc advance, the disc rotating partially instead of snapping cleanly to the next numeral. The disc retention pawl wears at the impulse face and produces hour-disc jitter under wrist movement. The dial aperture wears at its mounting points and the disc misaligns with the aperture window, showing fragments of two numerals simultaneously. A 1491 that "sets time but the hour disc disengages immediately" points to broken impulse spring engagement, a known and correctable service issue.
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	* Silvered dial with applied Breguet-style minute markers, hour aperture, sub-seconds. Typical on dressier white-gold and bicolor examples.		* Silvered dial with applied Breguet-style minute markers, hour aperture, sub-seconds. Typical on dressier white-gold and bicolor examples.
	* Two-tone sector dial with hour aperture and sub-seconds. Late 1930s Art-Deco geometric variants.		* Two-tone sector dial with hour aperture and sub-seconds. Late 1930s Art-Deco geometric variants.
	* Bucherer-double-signed dial. Antiquorum 2008 lot 692, white-gold ~~1491HS~~ with original 1945 Bucherer invoice. The only documented retailer-double on a 1491.		* Bucherer-double-signed dial. Antiquorum 2008 lot 692, white-gold 1491 with original 1945 Bucherer invoice. The only documented retailer-double on a 1491.
	* Beyer Zurich-signed dial. Phillips 2016 lot 89, silver Brancard with jumping hour. Phillips catalogued as ref. 1490 but the layout matches Antiquorum's 1491HS examples; the attribution dispute is unresolved at the catalog level.		* Beyer Zurich-signed dial. Phillips 2016 lot 89, silver Brancard with jumping hour. Phillips catalogued as ref. 1490 but the layout matches Antiquorum's 1491HS examples; the attribution dispute is unresolved at the catalog level.

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	# Case depth versus the 1490. A genuine 1491 case is measurably thicker than a 1490 case because the jumping-hour module sits on top of the standard Prince base movement. A side-by-side caliper measurement against a known-correct 1490 is the cleanest check. A Brancard claimed as a 1491 with 1490-equivalent case depth is either a 1490 with a refinished aperture-style dial (no jump module installed) or a 1490 case fitted with a later jump-hour mechanism in service.		# Case depth versus the 1490. A genuine 1491 case is measurably thicker than a 1490 case because the jumping-hour module sits on top of the standard Prince base movement. A side-by-side caliper measurement against a known-correct 1490 is the cleanest check. A Brancard claimed as a 1491 with 1490-equivalent case depth is either a 1490 with a refinished aperture-style dial (no jump module installed) or a 1490 case fitted with a later jump-hour mechanism in service.

	# Caseback HS suffix. Dressy white-gold and bicolor 1491HS examples carry "HS" on the inside of the caseback, sometimes with a factory case stamp (F2149HS at Antiquorum 2008, F220 at Bonhams 2024). The suffix is often dropped on accompanying factory papers, so a 1491 with an HS-marked caseback but a plain "1491" warranty card reflects ordinary factory practice. A 1491HS-marked caseback on a thinner 1490-depth case is a transplant.		# Caseback HS suffix. Dressy white-gold and bicolor 1491HS examples carry "HS" on the inside of the caseback, sometimes with a factory case stamp (F2149HS at Antiquorum 2008 lot 693, F220 at Bonhams 2024). The suffix is often dropped on accompanying factory papers, so a 1491 with an HS-marked caseback but a plain "1491" warranty card reflects ordinary factory practice. A 1491HS-marked caseback on a thinner 1490-depth case is a transplant.

	# Movement-to-module match. The jumping-hour module should be Aegler-built, recognizable from the integrated module-on-base architecture and the period-correct Aegler finish. A jump-hour module by Le Coultre, Hahn, Cortébert, or any other period maker under a Prince case is a transplant. The 1491 movement bridge should carry the standard Prince signing (Aegler or "Rolex Prince" depending on grade tier), with the module mounted to the rear of the bridge.		# Movement-to-module match. The jumping-hour module should be Aegler-built, recognizable from the integrated module-on-base architecture and the period-correct Aegler finish. A jump-hour module by Le Coultre, Hahn, Cortébert, or any other period maker under a Prince case is a transplant. The 1491 movement bridge should carry the standard Prince signing (Aegler or "Rolex Prince" depending on grade tier), with the module mounted to the rear of the bridge.
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	\| 2008		\| 2008
	\| Antiquorum (lot 692)		\| Antiquorum (lot 692)
	\| white-gold ~~1491HS~~ Bucherer-retailed, 1945 invoice, F2149HS case stamp		\| 9K white gold, Bucherer-retailed, 1945 invoice, case 1578
			\| est. CHF 44,000–50,000
			\|-
			\| 2008
			\| Antiquorum (lot 693)
			\| 18K white gold 1491HS, F2149HS case stamp
	\| est. CHF 44,000–50,000		\| est. CHF 44,000–50,000
	\|-		\|-
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	* "Rolex Prince 1491HS White + Yellow Gold Jumping Hour", Antiquorum, 1990		* "Rolex Prince 1491HS White + Yellow Gold Jumping Hour", Antiquorum, 1990
	* "Rolex Prince ~~1491HS~~ White Gold Bucherer-Retailed 1945", Antiquorum, 2008		* "Rolex Prince 1491 White Gold Bucherer-Retailed 1945, Case 1578", Antiquorum, 2008
			* "Rolex Prince 1491HS White Gold, Case F2149HS", Antiquorum, 2008
	* "Rolex Prince 1491HS 18K Bicolor Observatory 1935", Christie's, 2020		* "Rolex Prince 1491HS 18K Bicolor Observatory 1935", Christie's, 2020
	* "Rolex Prince 1491HS 18K Bicolor", Christie's, 2018		* "Rolex Prince 1491HS 18K Bicolor", Christie's, 2018

Klaudiusz: Text audit: voice, clarity — cut negation pivots and colon-elaboration slop, no fact changes

2026-09-07T13:00:54Z

Text audit: voice, clarity — cut negation pivots and colon-elaboration slop, no fact changes

Show changes