Reference:Movements: Difference between revisions

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For [[Reference:1073|ref. 1073]], Antiquorum names a 10½-ligne Extra Prima movement with 15 jewels. David Boettcher reports that Prima movements he has examined are generally 15-jewel, while the Extra Prima and Ultra Prima examples he has examined have 18 jewels. Antiquorum’s description is an exception to that pattern; its catalogue does not explain the mismatch. Christie's describes a 15-jewel Prima, and Bonhams calls another 15-jewel movement Ultra Prima. The lot descriptions give no shared caliber number or reference-wide grade. [https://catalog.antiquorum.swiss/en/lots/rolex-lot-15-258 Antiquorum]; [https://www.christies.com/lot/lot-811717 Christie's]; [https://www.collectorsquare.com/en/watches/rolex/oyster/ref-rolex-1073/lpi Bonhams archive]; [https://vintagewatchstraps.com/blogprima.php David Boettcher, movement-grade survey]

A scanned Oyster case-and-crown table lists ref. [[Reference:2416|2416]] at 10½ lignes in its “calibre size” column. TimeAnagram gives the same figure in a dealer movement field. A Hodinkee photograph of case 32342 shows a manual movement stamped “Rolex 15 rubies”; Bonhams also describes a 2416 movement as a patented Superbalance. The 10½ figure is movement size, and the numbered caliber remains unconfirmed. [https://www.vrfm.io/Scans/OYSTER-CROWNS-GUIDE.pdf Oyster case-and-crown table, ref. 2416 row]; [https://timeanagram.com/en/products/57171 TimeAnagram, ref. 2416 item 57171]; [https://www.hodinkee.com/articles/bring-a-loupe-march-14-2025 Hodinkee, case 32342]; [https://www.bonhams.com/auction/25954/lot/93/ Bonhams, case 37425]

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Cal. 1560 arrived in 1959 as the chronometer-grade 15xx movement, with a free-sprung balance adjusted to temperature and five positions. Auction catalogues give both 25 and 26 jewels without establishing a pattern. Antiquorum usually describes a Breguet overcoil; its flat-hairspring description for one ref. 1502/1503 is an outlier. The Oyster Perpetual ref. 1022 is documented with Cal. 1560 by Bonhams, Pandolfini, Adams, and HODINKEE; Tajan describes an automatic movement but names no caliber. Auction catalogues also identify Cal. 1560 in ref. 1024 examples dated circa 1965/66 and circa 1970. Antiquorum lists Cal. 1560 in a ref. 1011 dated 1960, case 546423, and in two lots jointly catalogued as refs. 1010/1011, dated 1960 and 1962. Heritage also lists Cal. 1560 in an undated ref. 1011 sold in 2012. Heritage and Bonhams list Cal. 1560 in individual ref. 1010 lots dated circa 1962 and circa 1967; Antiquorum lists Cal. 1570 in an individual ref. 1010 circa 1968. The Field Manual lists Cal. 1560 for ref. 1010. These records document both attributions for ref. 1010, and its changeover year remains open; see [[Reference:1010|ref. 1010]]. Antiquorum also catalogues Cal. 1560 in a 1963 ref. 1501, case 953,774; see [[Reference:1501|ref. 1501]] and [https://catalog.antiquorum.swiss/en/lots/rolex-lot-247-67 the lot record].

The Vintage Rolex Field Manual assigns Cal. 1560 to proposed monopusher refs. 1074 and 1223, but cites no identified watch or movement evidence for either link. [https://watchguy.co.uk/tmp/Rolex%201560.pdf Rolex’s standard Cal. 1560 parts sheet] describes a self-winding, sweep-seconds movement and does not document chronograph works. Christie’s catalogues two 1074 wristwatches without naming a caliber. A separate [https://www.christies.com/en/lot/lot-204177 Christie’s 1920s monopusher listing] gives 1223 as the case number, not as a verified reference; a [https://www.christies.com/en/lot/lot-6049981 ref. 28D1 pocket chronograph] uses 1223 as its movement number. Treat both Field Manual caliber assignments as unverified. [https://irp-cdn.multiscreensite.com/0b5fdf83/files/uploaded/1.0%20RolexBook-23Mar.pdf The Vintage Rolex Field Manual, printed p. 74] [https://www.christies.com/en/lot/lot-874668 Christie’s, model 1074] [https://www.christies.com/en/lot/lot-1473066 Christie’s, ref. 1074 case 25433]

Cal. 1560 uses free-sprung Microstella regulation; Cal. 1530 uses an index. Watches made from 1959 to 1965 were tested by the Bureaux Officiels de Contrôle de la Marche des Montres, usually under collective certificates and to a standard around −1/+10 seconds per day in five positions. COSC did not exist until September 1973, so describing an early 1560 as COSC-certified is anachronistic.

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* [https://catalog.antiquorum.swiss/en/lots/rolex-ref-3121-oyster-grenfell-lot-376-219 Antiquorum Geneva, 3 April 2025, lot 219]: ref. 3121 Oyster Grenfell, case 43,475, circa 1938, Cal. 59, 17 jewels.

* ''The Vintage Rolex Field Manual'' — Colin A. White, Morning Tundra

* [https://watchguy.co.uk/tmp/Rolex%201560.pdf Rolex Cal. 1560 spare-parts sheet no. 31; scan hosted by WatchGuy]

* [https://irp-cdn.multiscreensite.com/0b5fdf83/files/uploaded/1.0%20RolexBook-23Mar.pdf The Vintage Rolex Field Manual, printed p. 74, chronograph table]

* [https://www.christies.com/en/lot/lot-874668 Christie’s, model 1074, 1920s example]

* [https://www.christies.com/en/lot/lot-1473066 Christie’s, ref. 1074, case 25433]

* [https://www.christies.com/en/lot/lot-204177 Christie’s, case no. 1223 monopusher]

* [https://www.christies.com/en/lot/lot-6049981 Christie’s, ref. 28D1 pocket chronograph, movement no. 1223]

* [https://catalog.antiquorum.swiss/en/lots/rolex-ref-6075-lot-283-107 Antiquorum Geneva, 2014, ref. 6075 case 714441]: catalogued as A.295, with a 10½-ligne description.

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 For [[Reference:1073|ref. 1073]], Antiquorum names a 10½-ligne Extra Prima movement with 15 jewels. David Boettcher reports that Prima movements he has examined are generally 15-jewel, while the Extra Prima and Ultra Prima examples he has examined have 18 jewels. Antiquorum’s description is an exception to that pattern; its catalogue does not explain the mismatch. Christie's describes a 15-jewel Prima, and Bonhams calls another 15-jewel movement Ultra Prima. The lot descriptions give no shared caliber number or reference-wide grade. [https://catalog.antiquorum.swiss/en/lots/rolex-lot-15-258 Antiquorum]; [https://www.christies.com/lot/lot-811717 Christie's]; [https://www.collectorsquare.com/en/watches/rolex/oyster/ref-rolex-1073/lpi Bonhams archive]; [https://vintagewatchstraps.com/blogprima.php David Boettcher, movement-grade survey]
+A scanned Oyster case-and-crown table lists ref. [[Reference:2416|2416]] at 10½ lignes in its “calibre size” column. TimeAnagram gives the same figure in a dealer movement field. A Hodinkee photograph of case 32342 shows a manual movement stamped “Rolex 15 rubies”; Bonhams also describes a 2416 movement as a patented Superbalance. The 10½ figure is movement size, and the numbered caliber remains unconfirmed. [https://www.vrfm.io/Scans/OYSTER-CROWNS-GUIDE.pdf Oyster case-and-crown table, ref. 2416 row]; [https://timeanagram.com/en/products/57171 TimeAnagram, ref. 2416 item 57171]; [https://www.hodinkee.com/articles/bring-a-loupe-march-14-2025 Hodinkee, case 32342]; [https://www.bonhams.com/auction/25954/lot/93/ Bonhams, case 37425]
 <span id="cal-2849-note"></span>
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 Cal. 1560 arrived in 1959 as the chronometer-grade 15xx movement, with a free-sprung balance adjusted to temperature and five positions. Auction catalogues give both 25 and 26 jewels without establishing a pattern. Antiquorum usually describes a Breguet overcoil; its flat-hairspring description for one ref. 1502/1503 is an outlier. The Oyster Perpetual ref. 1022 is documented with Cal. 1560 by Bonhams, Pandolfini, Adams, and HODINKEE; Tajan describes an automatic movement but names no caliber. Auction catalogues also identify Cal. 1560 in ref. 1024 examples dated circa 1965/66 and circa 1970. Antiquorum lists Cal. 1560 in a ref. 1011 dated 1960, case 546423, and in two lots jointly catalogued as refs. 1010/1011, dated 1960 and 1962. Heritage also lists Cal. 1560 in an undated ref. 1011 sold in 2012. Heritage and Bonhams list Cal. 1560 in individual ref. 1010 lots dated circa 1962 and circa 1967; Antiquorum lists Cal. 1570 in an individual ref. 1010 circa 1968. The Field Manual lists Cal. 1560 for ref. 1010. These records document both attributions for ref. 1010, and its changeover year remains open; see [[Reference:1010|ref. 1010]]. Antiquorum also catalogues Cal. 1560 in a 1963 ref. 1501, case 953,774; see [[Reference:1501|ref. 1501]] and [https://catalog.antiquorum.swiss/en/lots/rolex-lot-247-67 the lot record].
+The Vintage Rolex Field Manual assigns Cal. 1560 to proposed monopusher refs. 1074 and 1223, but cites no identified watch or movement evidence for either link. [https://watchguy.co.uk/tmp/Rolex%201560.pdf Rolex’s standard Cal. 1560 parts sheet] describes a self-winding, sweep-seconds movement and does not document chronograph works. Christie’s catalogues two 1074 wristwatches without naming a caliber. A separate [https://www.christies.com/en/lot/lot-204177 Christie’s 1920s monopusher listing] gives 1223 as the case number, not as a verified reference; a [https://www.christies.com/en/lot/lot-6049981 ref. 28D1 pocket chronograph] uses 1223 as its movement number. Treat both Field Manual caliber assignments as unverified. [https://irp-cdn.multiscreensite.com/0b5fdf83/files/uploaded/1.0%20RolexBook-23Mar.pdf The Vintage Rolex Field Manual, printed p. 74] [https://www.christies.com/en/lot/lot-874668 Christie’s, model 1074] [https://www.christies.com/en/lot/lot-1473066 Christie’s, ref. 1074 case 25433]
 Cal. 1560 uses free-sprung Microstella regulation; Cal. 1530 uses an index. Watches made from 1959 to 1965 were tested by the Bureaux Officiels de Contrôle de la Marche des Montres, usually under collective certificates and to a standard around −1/+10 seconds per day in five positions. COSC did not exist until September 1973, so describing an early 1560 as COSC-certified is anachronistic.
@@ Line 3,035: / Line 3,039: @@
 * [https://catalog.antiquorum.swiss/en/lots/rolex-ref-3121-oyster-grenfell-lot-376-219 Antiquorum Geneva, 3 April 2025, lot 219]: ref. 3121 Oyster Grenfell, case 43,475, circa 1938, Cal. 59, 17 jewels.
 * ''The Vintage Rolex Field Manual'' — Colin A. White, Morning Tundra
+* [https://watchguy.co.uk/tmp/Rolex%201560.pdf Rolex Cal. 1560 spare-parts sheet no. 31; scan hosted by WatchGuy]
+* [https://irp-cdn.multiscreensite.com/0b5fdf83/files/uploaded/1.0%20RolexBook-23Mar.pdf The Vintage Rolex Field Manual, printed p. 74, chronograph table]
+* [https://www.christies.com/en/lot/lot-874668 Christie’s, model 1074, 1920s example]
+* [https://www.christies.com/en/lot/lot-1473066 Christie’s, ref. 1074, case 25433]
+* [https://www.christies.com/en/lot/lot-204177 Christie’s, case no. 1223 monopusher]
+* [https://www.christies.com/en/lot/lot-6049981 Christie’s, ref. 28D1 pocket chronograph, movement no. 1223]
 * [https://catalog.antiquorum.swiss/en/lots/rolex-ref-6075-lot-283-107 Antiquorum Geneva, 2014, ref. 6075 case 714441]: catalogued as A.295, with a 10½-ligne description.