Reference:6511 - Revision history

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site-wide: layout classes (core-facts card, breadcrumb, entry-point cards)

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	<small>[[Reference:day-date\|Day-Date]] -> '''6511'''</small>		<small>[[Reference:day-date\|Day-Date]] › '''6511'''</small>

	The 6511 is the fluted-bezel half of the original Day-Date. Rolex showed it at the Basel Fair in 1956 next to the smooth-bezel [[Reference:6510\|6510]]; the two references are mechanically identical and parted only by the finish of their bezels. The fluted bezel the 6511 carried became the visual signature of the Day-Date and has stayed on the model for seventy years. The 6510's smooth bezel did not survive the originals era. Both wear the first-generation caliber 1055, and both launched on a Jubilee bracelet rather than the President — the bracelet that gives the line its nickname arrives a year later with the 6611.		The 6511 is the fluted-bezel half of the original Day-Date. Rolex showed it at the Basel Fair in 1956 next to the smooth-bezel [[Reference:6510\|6510]]; the two references are mechanically identical and parted only by the finish of their bezels. The fluted bezel the 6511 carried became the visual signature of the Day-Date and has stayed on the model for seventy years. The 6510's smooth bezel did not survive the originals era. Both wear the first-generation caliber 1055, and both launched on a Jubilee bracelet rather than the President — the bracelet that gives the line its nickname arrives a year later with the 6611.
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	==Core facts==		==Core facts==

	{\| class="wikitable"		{\| class="wikitable rp-facts"
	\|-		\|-
	! detail		! detail

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site-wide: domain move BezelBase → Rolexopedia (rolexopedia.net)

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	{{DISPLAYTITLE:Rolex 6511 Day-Date}}		{{DISPLAYTITLE:Rolex 6511 Day-Date}}
	{{#seo:		{{#seo:
	\|title=Rolex 6511 Day-Date — The Fluted-Bezel 1956 Original, Caliber 1055, Jubilee Bracelet \| ~~BezelBase~~		\|title=Rolex 6511 Day-Date — The Fluted-Bezel 1956 Original, Caliber 1055, Jubilee Bracelet \| Rolexopedia
	\|description=The 6511 is the fluted-bezel half of the original 1956 Day-Date, sibling to the smooth-bezel 6510. First-generation caliber 1055, 36mm 18k gold Oyster on a Jubilee bracelet, pre-SCOC dial. The fluted bezel became the Day-Date signature; the President bracelet arrives a year later with the 6611.		\|description=The 6511 is the fluted-bezel half of the original 1956 Day-Date, sibling to the smooth-bezel 6510. First-generation caliber 1055, 36mm 18k gold Oyster on a Jubilee bracelet, pre-SCOC dial. The fluted bezel became the Day-Date signature; the President bracelet arrives a year later with the 6611.
	\|keywords=Rolex 6511, Day-Date, fluted bezel, caliber 1055, Jubilee bracelet, 6510, 6611, Basel 1956		\|keywords=Rolex 6511, Day-Date, fluted bezel, caliber 1055, Jubilee bracelet, 6510, 6611, Basel 1956

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	<small>[[Reference:day-date\|Day-Date]] → '''6511'''</small>		<small>[[Reference:day-date\|Day-Date]] -> '''6511'''</small>

	The 6511 is the fluted-bezel half of the original Day-Date. Rolex showed it at the Basel Fair in 1956 next to the smooth-bezel [[Reference:6510\|6510]]; the two references are mechanically identical and parted only by the finish of their bezels. The fluted bezel the 6511 carried became the visual signature of the Day-Date and has stayed on the model for seventy years. The 6510's smooth bezel did not survive the originals era. Both wear the first-generation caliber 1055, and both launched on a Jubilee bracelet rather than the President — the bracelet that gives the line its nickname arrives a year later with the 6611.		The 6511 is the fluted-bezel half of the original Day-Date. Rolex showed it at the Basel Fair in 1956 next to the smooth-bezel [[Reference:6510\|6510]]; the two references are mechanically identical and parted only by the finish of their bezels. The fluted bezel the 6511 carried became the visual signature of the Day-Date and has stayed on the model for seventy years. The 6510's smooth bezel did not survive the originals era. Both wear the first-generation caliber 1055, and both launched on a Jubilee bracelet rather than the President — the bracelet that gives the line its nickname arrives a year later with the 6611.

Admin: Text audit: voice, clarity, source links

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Text audit: voice, clarity, source links

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	The 6511 is the fluted-bezel half of the original Day-Date. Rolex showed it at the Basel Fair in 1956 next to the smooth-bezel [[Reference:6510\|6510]]; the two references are mechanically identical and parted only by the finish of their bezels. The fluted bezel the 6511 carried became the visual signature of the Day-Date and has stayed on the model for seventy years. The 6510's smooth bezel did not survive the originals era. Both wear the first-generation caliber 1055, and both launched on a Jubilee bracelet rather than the President — the bracelet that gives the line its nickname arrives a year later with the 6611.		The 6511 is the fluted-bezel half of the original Day-Date. Rolex showed it at the Basel Fair in 1956 next to the smooth-bezel [[Reference:6510\|6510]]; the two references are mechanically identical and parted only by the finish of their bezels. The fluted bezel the 6511 carried became the visual signature of the Day-Date and has stayed on the model for seventy years. The 6510's smooth bezel did not survive the originals era. Both wear the first-generation caliber 1055, and both launched on a Jubilee bracelet rather than the President — the bracelet that gives the line its nickname arrives a year later with the 6611.

	The cataloged run lasts a single year before the 6611 takes over. Surviving cases push the production window earlier than the launch itself~~: the~~ two earliest documented examples were made in 1955, ahead of the Basel debut. The patent history, the origin of the Presidential nickname, and the full originals-era roster belong to the [[Reference:6510\|6510]] entry~~. What follows is specific to the 6511 — its bezel, its dials, its metals, and a well-populated auction record~~.		The cataloged run lasts a single year before the 6611 takes over. Surviving cases push the production window earlier than the launch itself. The two earliest documented examples were made in 1955, ahead of the Basel debut. The patent history, the origin of the Presidential nickname, and the full originals-era roster belong to the [[Reference:6510\|6510]] entry.

	[[File:Ref 6511 hero.webp\|thumb\|right\|300px\|alt=Rolex Day-Date 6511 in yellow gold on a Jubilee bracelet\|Rolex Day-Date 6511 in 18k yellow gold on a Jubilee bracelet — the fluted Millerighe bezel that became the Day-Date signature.]]		[[File:Ref 6511 hero.webp\|thumb\|right\|300px\|alt=Rolex Day-Date 6511 in yellow gold on a Jubilee bracelet\|Rolex Day-Date 6511 in 18k yellow gold on a Jubilee bracelet — the fluted Millerighe bezel that became the Day-Date signature.]]
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	The 6510 and 6511 launched together as a bezel-finish pair. Everything else about them matches: the 36mm Oyster case, the Twinlock crown, the acrylic crystal, the first-generation caliber 1055, the Jubilee bracelet, the single cataloged year. The bezel is the one intended difference. The 6510 took the smooth, gently domed bezel; the 6511 took the fluted "Millerighe" bezel, the corrugated edge Rolex had used on the Datejust through the early 1950s. Of the two finishes, the fluted one became the Day-Date's identity, which is why the 6511 reads today as the more familiar of the originals even though the 6510 carries the lower number.		The 6510 and 6511 launched together as a bezel-finish pair. Everything else about them matches: the 36mm Oyster case, the Twinlock crown, the acrylic crystal, the first-generation caliber 1055, the Jubilee bracelet, the single cataloged year. The bezel is the one intended difference. The 6510 took the smooth, gently domed bezel; the 6511 took the fluted "Millerighe" bezel, the corrugated edge Rolex had used on the Datejust through the early 1950s. Of the two finishes, the fluted one became the Day-Date's identity, which is why the 6511 reads today as the more familiar of the originals even though the 6510 carries the lower number.

	The pair sit apart from the rest of the originals-era cluster on two counts. They are the only Day-Date references to use the first-generation cal 1055, and the only two to ship on the Jubilee. From the 6611 onward the line moves to the Microstella-regulated, COSC-certified second-generation caliber and to the President bracelet, and the "Superlative Chronometer Officially Certified" dial designation appears for the first time. The 6511 is the last fluted-bezel Day-Date before the President bracelet ~~that~~ the design is now inseparable from.		The pair sit apart from the rest of the originals-era cluster on two counts. They are the only Day-Date references to use the first-generation cal 1055, and the only two to ship on the Jubilee. From the 6611 onward the line moves to the Microstella-regulated, COSC-certified second-generation caliber and to the President bracelet, and the "Superlative Chronometer Officially Certified" dial designation appears for the first time. The 6511 is the last fluted-bezel Day-Date made before the President bracelet the design is now inseparable from.

	==Production outline==		==Production outline==

	Rolex debuted the 6510 and 6511 together at the Basel Fair in 1956, but production had already started~~: the~~ earliest documented 6511 cases, 111,654 and 134,692, were both made in 1955, before the public launch. Case numbers on surfaced examples run from that 1955 cluster up to 166,725 in 1956, a narrow band consistent with a short run. No Rolex archival production figure has surfaced for the reference.		Rolex debuted the 6510 and 6511 together at the Basel Fair in 1956, but production had already started. The earliest documented 6511 cases, 111,654 and 134,692, were both made in 1955, before the public launch. Case numbers on surfaced examples run from that 1955 cluster up to 166,725 in 1956, a narrow band consistent with a short run. No Rolex archival production figure has surfaced for the reference.

	By 1957 the 6611 replaces the 6511. The ~~change is mechanical and aesthetic at once: the~~ upgraded caliber, the President bracelet, and the ~~new~~ chronometer-certified dial all arrive together, so the 6511 ~~marks the end of~~ the first Jubilee-and-1055 phase of the Day-Date rather than ~~a model that ran~~ alongside its successor. The whole originals-era cluster gives way to the 1803 and its siblings around 1959.		By 1957 the 6611 replaces the 6511. The upgraded caliber, the President bracelet, and the chronometer-certified dial all arrive together, so the 6511 closes the first Jubilee-and-1055 phase of the Day-Date rather than running alongside its successor. The whole originals-era cluster gives way to the 1803 and its siblings around 1959.

	==Movement notes==		==Movement notes==

	The 6511 carries the first-generation caliber 1055, the founding day-date complication movement and a caliber it shares only with the 6510. It runs at 18,000 vph (2.5 Hz) on 25 jewels, measures 28.50mm across and about 7.0mm tall, and holds roughly 42 hours. It has no Microstella balance, no COSC certification, and a gradual rather than instant changeover at midnight~~: the~~ early caliber lacks the stored torque to flip both the day disc and the date through in a single impulse, so the two calendars settle into place over a window either side of twelve. That changeover is the deficiency usually blamed for the reference's single-year life. The 6611's second-generation caliber, internally a 1055B, fixed it in 1957 alongside the free-sprung Microstella balance and COSC certification. The full caliber lineage sits on [[Reference:Movements]].		The 6511 carries the first-generation caliber 1055, the founding day-date complication movement and a caliber it shares only with the 6510. It runs at 18,000 vph (2.5 Hz) on 25 jewels, measures 28.50mm across and about 7.0mm tall, and holds roughly 42 hours. It has no Microstella balance, no COSC certification, and a gradual rather than instant changeover at midnight. The early caliber lacks the stored torque to flip both the day disc and the date through in a single impulse, so the two calendars settle into place over a window either side of twelve. That changeover is the deficiency usually blamed for the reference's single-year life. The 6611's second-generation caliber, internally a 1055B, fixed it in 1957 alongside the free-sprung Microstella balance and COSC certification. The full caliber lineage sits on [[Reference:Movements]].

	~~Auction movement descriptions add useful texture to the plain specification sheet.~~ A 1956 example was catalogued with a rhodium-plated cal. 1055, oeil-de-perdrix decoration, straight-line lever escapement, monometallic balance adjusted to temperatures and five positions, shock protection, and a self-compensating Breguet balance spring. Those details fit the 6511's odd place in the line: technically ambitious and chronometer-minded, but still ~~before~~ the Microstella-regulated ~~generation~~ that made the Day-Date formula stable.		A 1956 example was catalogued at auction with a rhodium-plated cal. 1055, oeil-de-perdrix decoration, straight-line lever escapement, monometallic balance adjusted to temperatures and five positions, shock protection, and a self-compensating Breguet balance spring. Those details fit the 6511's odd place in the line, technically ambitious and chronometer-minded but still one generation short of the Microstella-regulated caliber that made the Day-Date formula stable.

	The dial designation on the 6511 is pre-SCOC, reading either "Superlative Chronometer by Official Test" or "Officially Certified Chronometer" depending on the example; the four-line "Superlative Chronometer Officially Certified" block is the 6611's introduction. Auction catalogues occasionally mis-state the caliber. Phillips listed the movement of its 1955 yellow-gold lot as a 1555, a caliber that did not exist until the 1803 era; a watch of this date carries the 1055.		The dial designation on the 6511 is pre-SCOC, reading either "Superlative Chronometer by Official Test" or "Officially Certified Chronometer" depending on the example; the four-line "Superlative Chronometer Officially Certified" block is the 6611's introduction. Auction catalogues occasionally mis-state the caliber. Phillips listed the movement of its 1955 yellow-gold lot as a 1555, a caliber that did not exist until the 1803 era; a watch of this date carries the 1055.
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	Surfaced 6511 examples spread across several factory dial colours, all sharing the period layout: the full-word day aperture at twelve, the date at three under a Cyclops, applied faceted gold indices, dauphine or alpha hands, and radium lume.		Surfaced 6511 examples spread across several factory dial colours, all sharing the period layout: the full-word day aperture at twelve, the date at three under a Cyclops, applied faceted gold indices, dauphine or alpha hands, and radium lume.

	The red printing carries information beyond colour. The 1955 yellow-gold example with case 111,654 places the red "Day-Date" signature at six o'clock and pairs it with a red date wheel, while other early examples move toward the more familiar chronometer text hierarchy. The 6511 dial map is therefore less settled than later Day-Dates: Rolex was still deciding where the model name, chronometer line, and calendar colour ~~should sit~~ on a flagship calendar dial.		The red printing carries information beyond colour. The 1955 yellow-gold example with case 111,654 places the red "Day-Date" signature at six o'clock and pairs it with a red date wheel, while other early examples move toward the more familiar chronometer text hierarchy. The 6511 dial map is therefore less settled than later Day-Dates. Rolex was still deciding where the model name, chronometer line, and calendar colour belonged on a flagship calendar dial.

	{\| class="wikitable"		{\| class="wikitable"
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	The 6511 uses the 36mm three-piece Oyster case that becomes the Day-Date standard for the next five decades: screw-down Twinlock crown, screw-down caseback, acrylic crystal. The case is the same one the 6510 wears; the bezel is what sets the reference apart.		The 6511 uses the 36mm three-piece Oyster case that becomes the Day-Date standard for the next five decades: screw-down Twinlock crown, screw-down caseback, acrylic crystal. The case is the same one the 6510 wears; the bezel is what sets the reference apart.

	That bezel is the fluted "Millerighe," the finely corrugated ring Rolex carried over from the early Datejust. ~~Sources differ on what to call it: some describe~~ the early pattern as fluted~~, others as~~ a tighter "coin-edge" cut, ~~but the~~ labels point at the same physical bezel ~~rather than a factual split~~. The flutes are cut into solid 18k gold matching the case. This is the bezel that defines the Day-Date silhouette, and the 6511 is where it enters the line.		That bezel is the fluted "Millerighe," the finely corrugated ring Rolex carried over from the early Datejust. Descriptions of the early pattern vary between fluted and a tighter "coin-edge" cut, though both labels point at the same physical bezel. The flutes are cut into solid 18k gold matching the case. This is the bezel that defines the Day-Date silhouette, and the 6511 is where it enters the line.

	The metals are where the sources genuinely disagree. Yellow gold is the production-volume case material and pink gold is confirmed but uncommon, the pink-gold Phillips lot settling that variant directly. White gold and platinum are contested: Fratello lists both among the originals' metals, while Rolex Magazine limits the 1956 launch to 18k pink and yellow gold, and no white-gold or platinum 6511 has surfaced in the auction record. The documented platinum piece of the originals era is the diamond-set 6612, not a 6511.		The metals are where the sources genuinely disagree. Yellow gold is the production-volume case material and pink gold is confirmed but uncommon, the pink-gold Phillips lot settling that variant directly. White gold and platinum are contested: Fratello lists both among the originals' metals, while Rolex Magazine limits the 1956 launch to 18k pink and yellow gold, and no white-gold or platinum 6511 has surfaced in the auction record. The documented platinum piece of the originals era is the diamond-set 6612, not a 6511.
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	[[File:Ref 6511 bracelet.webp\|thumb\|right\|250px\|alt=6511 yellow-gold Jubilee bracelet\|The 18k yellow-gold Jubilee bracelet — the period-correct fitment before the President bracelet arrived with the 6611.]]		[[File:Ref 6511 bracelet.webp\|thumb\|right\|250px\|alt=6511 yellow-gold Jubilee bracelet\|The 18k yellow-gold Jubilee bracelet — the period-correct fitment before the President bracelet arrived with the 6611.]]

	The period-correct 6511 fitment is the Jubilee, the five-link bracelet Rolex had used as its house luxury band since the late 1940s. A Monaco Legend yellow-gold lot still wearing its original yellow-gold Jubilee is the cleanest confirmation. The President bracelet, the three-link semi-circular band designed for this watch, does not arrive until the 6611 in 1957, and here the sources split: Fratello describes the originals as delivered on the President under an earlier name, while Monochrome and the surfaced examples place them on the Jubilee.		The period-correct 6511 fitment is the Jubilee, the five-link bracelet Rolex had used as its house luxury band since the late 1940s. A Monaco Legend yellow-gold lot still wearing its original yellow-gold Jubilee is the cleanest confirmation. The President bracelet, the three-link semi-circular band designed for this watch, does not arrive until the 6611 in 1957, and here the sources split: Fratello describes the originals as delivered on the President under an earlier name, while Monochrome and the surfaced examples place them on the Jubilee. The Basel-era advertising reproduced by Rolex Magazine shows the first Day-Date on a Jubilee and gives the 1956 launch as 18k pink or yellow gold on that bracelet, with the President added the following year.

	~~The period advertising case is stronger than the later summary articles~~. The Basel-era ~~material~~ reproduced by Rolex Magazine shows the first Day-Date on a Jubilee ~~bracelet~~ and ~~states~~ the 1956 launch in 18k pink or yellow gold on ~~Jubilee~~, with the President ~~bracelet~~ added the following year~~. Treat later President bracelets on 6511s as plausible period-correct wear, not proof of original delivery~~.

	In practice the bracelet on a surviving 6511 proves little. Confirmed lots turn up on Presidents, on "Big Logo" bracelets, and on later brick-link bands — a Bonhams example wears an 18ct bracelet hallmarked 1959, three years after the case. These are period swaps and service replacements; the clasp code dates the bracelet, not the watch head.		In practice the bracelet on a surviving 6511 proves little. Confirmed lots turn up on Presidents, on "Big Logo" bracelets, and on later brick-link bands — a Bonhams example wears an 18ct bracelet hallmarked 1959, three years after the case. These are period swaps and service replacements; the clasp code dates the bracelet, not the watch head.
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	\|}		\|}

	A clean standard-gold 6511 has settled into roughly the EUR 35,000–55,000 band in recent sales, with the Phillips full-set yellow-gold lot a clear outlier on the strength of its papers and pre-launch date. ~~Further pink~~-gold and tropical-dial ~~lots appear in the aggregated record~~ at Christie's and Antiquorum ~~but have not been confirmed against the houses' own lot pages.~~		A clean standard-gold 6511 has settled into roughly the EUR 35,000–55,000 band in recent sales, with the Phillips full-set yellow-gold lot a clear outlier on the strength of its papers and pre-launch date. Pink-gold and tropical-dial examples have also come up at Christie's and Antiquorum, though those results are less firmly documented.

	One result sits outside the band entirely. Monaco Legend sold a steel 1955 prototype with a tropical dial and a gold bezel for EUR 1,196,000 in October 2024, an example from John Goldberger's collection published in Pucci Papaleo Editore's ''Day-Date — The Presidential Rolex'' (Spin Edizioni, 2015). Its reference is disputed: Monaco Legend catalogued it as a 6511, while Sotheby's and Monochrome attribute the five known steel pre-launch prototypes to the 6611. Either way it is a record-tier one-off, ~~not a guide to the standard-production market~~.

			One result sits outside the band entirely. Monaco Legend sold a steel 1955 prototype with a tropical dial and a gold bezel for EUR 1,196,000 in October 2024, an example from John Goldberger's collection published in Pucci Papaleo Editore's ''Day-Date — The Presidential Rolex'' (Spin Edizioni, 2015). Its reference is disputed: Monaco Legend catalogued it as a 6511, while Sotheby's and Monochrome attribute the five known steel pre-launch prototypes to the 6611. Either way it is a record-tier one-off with no bearing on the standard-production market.

	== Related references ==		== Related references ==

Admin: Style: canonical '== Sources ==' heading spacing per AGENTS.md

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

	==Sources==		== Sources ==

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

Admin: Add missing {{DISPLAYTITLE:Rolex 6511 Day-Date}} — page was rendering under the bare 'Reference:6511' title

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Add missing {{DISPLAYTITLE:Rolex 6511 Day-Date}} — page was rendering under the bare 'Reference:6511' title

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			{{DISPLAYTITLE:Rolex 6511 Day-Date}}
	{{#seo:		{{#seo:
	\|title=Rolex 6511 Day-Date — The Fluted-Bezel 1956 Original, Caliber 1055, Jubilee Bracelet \| BezelBase		\|title=Rolex 6511 Day-Date — The Fluted-Bezel 1956 Original, Caliber 1055, Jubilee Bracelet \| BezelBase

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	\|og_type=article		\|og_type=article
	\|published_time=2026-06-02T21:30:08Z		\|published_time=2026-06-02T21:30:08Z
	\|modified_time=2026-08-04T00:12:~~17Z~~		\|modified_time=2026-08-04T00:14:16Z
	\|robots=index,follow,max-image-preview:large		\|robots=index,follow,max-image-preview:large
	}}		}}

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	{{#seo:		{{#seo:
	\|title=Rolex 6511 Day-Date — The Fluted-Bezel 1956 Original, Caliber 1055, Jubilee Bracelet \| BezelBase		\|title=Rolex 6511 Day-Date — The Fluted-Bezel 1956 Original, Caliber 1055, Jubilee Bracelet \| BezelBase
	\|description=The 6511 is the fluted-bezel half of the original 1956 Day-Date, sibling to the smooth-bezel 6510. First-generation caliber 1055, 36mm 18k gold Oyster on a Jubilee bracelet, pre-SCOC dial. The fluted bezel became the Day-Date signature; the President bracelet arrives a year later with the 6611.		\|description=The 6511 is the fluted-bezel half of the original 1956 Day-Date, sibling to the smooth-bezel 6510. First-generation caliber 1055, 36mm 18k gold Oyster on a Jubilee bracelet, pre-SCOC dial. The fluted bezel became the Day-Date signature; the President bracelet arrives a year later with the 6611.
	\|keywords=Rolex 6511, Day-Date, fluted bezel, caliber 1055, Jubilee bracelet, 6510, 6611, Basel 1956		\|keywords=Rolex 6511, Day-Date, fluted bezel, caliber 1055, Jubilee bracelet, 6510, 6611, Basel 1956
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	\|og_type=article		\|og_type=article
	\|published_time=2026-06-02T21:30:08Z		\|published_time=2026-06-02T21:30:08Z
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Admin: Status: mark complete, remove Working Draft category (161-ref triage pass)

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Status: mark complete, remove Working Draft category (161-ref triage pass)

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	[[Category:Day-Date]]		[[Category:Day-Date]]
	~~[[Category:Working Draft]]~~
	[[Category:References]]		[[Category:References]]

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Fix category casing: working-draft -> Working Draft (consolidate tracking category)

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	[[Category:Day-Date]]		[[Category:Day-Date]]
	[[Category:~~working-draft~~]]		[[Category:Working Draft]]
	[[Category:References]]		[[Category:References]]