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Audit 6511 sources, movement record and images
 
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{{DISPLAYTITLE:Rolex Day-Date 6511}}
{{#seo:
{{#seo:
|title=Rolex 6511 Day-Date — The Fluted-Bezel 1956 Original, Caliber 1055, Jubilee Bracelet | BezelBase
|title=Rolex Day-Date 6511 — Fluted Bezel, Dials and Auction Records | 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 fluted-bezel member of the early Day-Date pair. Auction records document varied dials, gold cases, conflicting movement labels and mixed bracelet fitments.
|keywords=Rolex 6511, Day-Date, fluted bezel, caliber 1055, Jubilee bracelet, 6510, 6611, Basel 1956
|keywords=Rolex, Day-Date, 6511, 6510, caliber 1055, Millerighe, President bracelet
|image=Ref 6511 hero.webp
|image=Ref 6511 hero.webp
|image_alt=Rolex Day-Date 6511 — the fluted-bezel 1956 original in yellow gold on a Jubilee bracelet
|image_alt=Yellow-gold Day-Date 6511 with a silver dial and Jubilee bracelet
|type=article
|type=Article
|og_type=article
|og_type=article
|published_time=2026-06-02T21:30:08Z
|modified_time=2026-10-11T11:30:00Z
|robots=index,follow,max-image-preview:large
|robots=index,follow,max-image-preview:large
}}
}}
<small>[[Reference:day-date|Day-Date]] → '''6511'''</small>
<small>[[Reference:day-date|Day-Date]] → '''6511'''</small>
<div class="rp-lead">
[[File:Ref 6511 hero.webp|thumb|center|640px|alt=Yellow-gold Day-Date 6511 with a silver dial and Jubilee bracelet|Monaco Legend, 2024, lot 220; case 166,725.]]
</div>


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 member of the first Day-Date pair, alongside the smooth-bezel 6510. Rolex dates the Day-Date launch to 1956, while [https://www.phillips.com/detail/rolex/CH080115/40 Phillips catalogs two 6511 cases] as made in 1955. Auction records document yellow- and pink-gold cases, several dial layouts, and movement and bracelet combinations that vary by watch. These lots give examples, not a complete specification for the reference.
 
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.
 
[[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.]]


==Core facts==
==Core facts==


{| class="wikitable"
{| class="wikitable rp-facts"
|-
|-
! detail
! detail
Line 28: Line 29:
| 6511
| 6511
|-
|-
| family
| model
| Day-Date
| Day-Date, with the day spelled out at 12 and date at 3
|-
|-
| catalogue debut
| bezel
| Basel Fair 1956
| fluted; often called “Millerighe” in auction catalogues
|-
|-
| production
| launch
| 1956–1957 cataloged; earliest documented cases made 1955
| [https://www.rolex.com/about-rolex/history/1953-1967 Rolex dates the Day-Date debut to 1956]; references 6510 and 6511 are commonly treated as the launch pair
|-
|-
| movement
| production dates
| caliber 1055, first generation (no Microstella, no COSC, gradual midnight changeover, pre-SCOC dial line)
| Monochrome dates the 6510/6511 pair to 1956–57; Sotheby’s says the pair lasted one year before the 6611. Auction catalogues date individual cases to 1955, 1956, and 1956–57.
|-
|-
| case
| case
| 36mm 18k gold Oyster — yellow gold (production-volume), pink gold (uncommon), white gold (rare, disputed at launch)
| 36mm tonneau-shaped Oyster case in most cited lots; Dorotheum's 2017 listing gives approximately 35mm. Antiquorum describes a screw-down crown and caseback.
|-
| materials documented below
| 18ct yellow gold and 18ct pink gold
|-
|-
| crystal
| movement
| acrylic
| Phillips lot 40 and Dorotheum lot 255 list 1555; six other located non-prototype lots list 1055. The movement in each watch needs individual confirmation.
|-
|-
| bezel
| dial wording
| fluted ("Millerighe")
| Examples include red “DAY-DATE,” “Officially Certified Chronometer,” and a pink dial catalogued without a chronometer line
|-
|-
| bracelet
| bracelet
| Jubilee (the President bracelet arrives with the 6611 in 1957)
| Auction lots and a contemporary collector article document President, Jubilee, Big Logo, leather, and brick-link combinations. Original delivery remains watch-specific.
|-
|-
| crown
| crystal
| Twinlock screw-down
| Monochrome describes acrylic crystals on Day-Dates of this era; the early lot descriptions inspected here are mostly silent about the material
|-
| sibling
| 6510 (smooth/domed bezel, parallel 1956 launch)
|-
| successor
| 6611 (1957 — Microstella cal 1055B, COSC, President bracelet)
|}
|}


==Where it sits in the line==
==Place in the line==


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.
Sotheby’s and Monochrome identify the 6510 and 6511 as the 1956 launch pair, with a smooth or domed bezel on the 6510 and a fluted bezel on the 6511. Surviving examples also vary in dial inscriptions, movement labels, and bracelets.


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.
Rolex dates the Day-Date debut and the President bracelet’s unveiling to 1956. Erik Slaven’s Monochrome history says the 6510 and 6511 came on Jubilee bracelets before the President became standard with the 6611. Jake Ehrlich’s Rolex Magazine describes a pictured 6511 as “pre-Presidential” and shows it on a Jubilee. Phillips catalogs a 1955-dated 6511 with a President bracelet and clasp stamped 2.57. The clasp stamp dates that bracelet component; these records do not settle original delivery for every watch.


==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.
The public launch was in 1956. Phillips dates case 111,654 to the fourth quarter of 1955 and case 134,692 to 1955. Monaco Legend lists case 111,695 as 1955 in its lot details, while its catalogue prose says 1956; the same house dates case 166,725 to 1956. Dorotheum dates case 166736 to 1956–57, but its 2017 listing dates case 166744 circa 1965. [[Reference:Serial-numbers|Pergola's unofficial chart]] puts 166744 in its 1956 band. The 2017 listing offers no readable view of the case number, leaving the catalogue date and serial chart in conflict.


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.
Reference histories commonly date the 6611 from 1957; some auction descriptions place examples in 1956, leaving the transition year uncertain. The [[Reference:Serial-numbers|serial-number guide]] records the individual case estimates and the limits of generic serial charts.


==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]].
Phillips lot 40 and Dorotheum lot 255 list Cal. 1555 for cases 111,654 and 166736. Phillips lot 41, Antiquorum lot 81, Bonhams lot 156, Monaco Legend lots 22 and 220, and Dorotheum's 2017 lot for case 166744 list Cal. 1055. [https://www.phillips.com/detail/rolex/CH080219/247 Phillips's catalogue essay] dates Cal. 1555 to 1959; [https://monochrome-watches.com/history-rolex-day-date-1956-present-president-watch-in-depth-review/ Monochrome's Day-Date history] places it with the later 1800-series generation. Those chronologies postdate the 1955 and 1956–57 dates assigned to cases 111,654 and 166736. A replacement movement or catalogue error could explain the 1555 labels, but the lot records leave the reason unresolved. Keep each attribution tied to its watch pending movement inspection. The disputed steel-prototype catalogue is a separate case and is excluded from this count.
 
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.


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 [[Reference:Movements|movement reference]] describes the 1055 family and its disputed details. Antiquorum’s 2008 description calls its 1055 free-sprung and specifies a Breguet balance spring; other sources place that balance revision later. Keep the description tied to lot 81 and check each watch's movement directly.


==Dial map==
==Dial map==


[[File:Ref 6511 dial.webp|thumb|right|250px|alt=6511 pre-SCOC dial|The pre-SCOC dial reading "Officially Certified Chronometer", with the full-word day aperture at twelve. Image via Antiquorum.]]
These auction records document several dial layouts:
 
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.


{| class="wikitable"
{| class="wikitable"
|-
|-
! dial
! lot
! indices / detail
! catalogue description
! chronometer line
|-
! documented on
| Phillips, 2015, lot 40; case 111,654
| Champagne/gold dial with red “Day-Date” text at 6 and a red date wheel; the catalogue dates the case to Q4 1955 and lists Cal. 1555.
|-
|-
| champagne / gold
| Phillips, 2015, lot 41; case 134,692
| applied faceted gold batons, red printed "Day-Date", red date wheel
| Pink dial with no chronometer-certification line; the lot description also records red-and-black date numerals and “Day-Date” text at 12.
| pre-SCOC
| yellow gold (Phillips 2015 lot 40)
|-
|-
| silvered / white
| Antiquorum, 2008, lot 81
| applied faceted gold batons, red "Day-Date"
| White dial with “Officially Certified Chronometer,” applied gold batons, luminous dots and alpha hands. Antiquorum graded the dial separately; treat its wording as the house's description of this example.
| "Officially Certified Chronometer"
| yellow gold (Antiquorum 2008 lot 81; Monaco Legend 2024 lot 220)
|-
|-
| black gloss / lacquer
| Monaco Legend, 2024, lot 220; case 166,725
| applied gold indices, radium plots
| Silver/white dial with red “DAY-DATE” text and “50 m = 165 ft” depth marking. The catalogue also notes luminous dots.
| pre-SCOC
| less common; yellow and pink gold
|-
|-
| pink
| Monaco Legend, 2023, lot 22; case 111,695
| red-and-black date
| Grey/patinated dial and Portuguese day disc; the listing says the hour markers have no luminous dots. Its year field and catalogue prose disagree.
| none printed
|-
| pink gold (Phillips 2015 lot 41)
| Dorotheum, 2026, lot 255; case 166736
| White dial with day and date displays; its catalogue lists Cal. 1555 and a chronometer certificate.
|}
|}


The pink-gold Phillips lot is the clearest evidence that some early dials carry no chronometer line at all, a pre-certification quirk rather than a refinish. A small number of examples add a depth rating to the dial. One Monaco Legend yellow-gold lot reads "50 m = 165 ft" beneath the centre, a holdover from period Oyster dial practice. Day discs follow the retail market: English is the rule, and a Portuguese-calendar disc is documented on at least one yellow-gold example. Grey and tropical-brown dials surface on aged examples, the result of radium oxidation and lacquer breakdown over seventy years rather than a separate factory finish; black-dial pink-gold examples that have gone tropical command their own following.
Keep “factory dial” labels attached to their sale lots. Antiquorum grades one dial as good; Monaco Legend calls another patinated. A color change or unusual text needs independent evidence before it can define a factory variant. These records document several layouts; the full dial range has yet to be established.


==Case, bezel, crystal, and crown==
[[File:Ref 6511 dial-detail.webp|thumb|right|220px|Monaco Legend, 2024, lot 220: dial text and depth marking.]]


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.
==Case, bezel and crown==


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.
Auction houses describe the 6511 as a 36mm, tonneau-shaped Oyster case with a fluted bezel. Antiquorum’s lot 81 calls its case three-body and lists a screwed-down crown and caseback; Phillips describes its 1955 example as thicker and more curved than contemporary Datejust cases, with a rounded screw-down back. Treat these as lot descriptions rather than a complete construction record for the reference.


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.
Phillips calls the early bezel “Millerighe”; “fluted” is the plain English term. Rolex says the Day-Date launched in 18ct gold or platinum. The located 6511 lots document yellow and pink gold. Other metals remain unverified.


==Bracelets, end links, and clasps==
<gallery mode="packed" heights="180">
File:Ref 6511 bezel.webp|Monaco Legend, 2024, lot 220: fluted bezel and case edge.
File:Ref 6511 caseback.webp|Monaco Legend, 2024, lot 220: exterior caseback; no case number is visible.
</gallery>


[[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.]]
==Bracelets and clasps==


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.
Rolex says the President bracelet was made specially for the Day-Date and unveiled in 1956. Jake Ehrlich’s Rolex Magazine labels a pictured 6511 “pre-Presidential” and shows it on a Jubilee bracelet. Auction records also show mixed fitments: Phillips catalogues case 134,692 on a President bracelet with a clasp stamped 2.57; Monaco Legend describes case 166,725 on a Jubilee; and its 2023 case 111,695 was offered on a leather strap with a separate yellow-gold Big Logo bracelet listed among the accessories. Bonhams records another 6511 with a gold brick-link bracelet hallmarked 1959, three years after its stated 1956 Glasgow import mark. The available examples leave original delivery specific to each watch.


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.
Dorotheum explicitly says the bracelet on its 2017 case 166744 is not original. A bracelet or clasp date belongs to that component. Date the watch head from its own evidence, and assess original delivery separately. The [[Reference:Bracelets|bracelet guide]] explains the distinction.


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.
<gallery mode="packed" heights="180">
File:Ref 6511 bracelet.webp|Monaco Legend, 2024, lot 220: Jubilee bracelet fitted to case 166,725.
File:Ref 6511 clasp.webp|Monaco Legend, 2024, lot 220: bracelet and clasp view; the image shows this lot, not universal fitment.
</gallery>
 
==Steel prototype attribution==
 
Monaco Legend sold case 99,272 as a steel 6511 prototype with a white-gold bezel and riveted Oyster bracelet. Other published histories assign the small steel Day-Date prototype group to reference 6611. Keep Monaco Legend’s 6511 attribution separate from the standard specification while the reference remains disputed.


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


The 6511 is the better-documented of the two originals at auction, helped by Phillips's inaugural watch sale. Confirmed lots:
The table keeps sale-house descriptions and results attached to each lot. Both totals appear where a lot page and results PDF differ.


{| class="wikitable"
{| class="wikitable"
|-
|-
! sale
! sale record
! date
! catalogue details and result
! metal
|-
! result
| Phillips, “Glamorous Day-Date,” 2015, lot 40
! notes
| Case 111,654; 18ct yellow gold; dated Q4 1955; 36mm; red “Day-Date” text and red date wheel; movement listed as 1555. Sold for CHF 191,000.
|-
| Phillips, “Glamorous Day-Date,” 2015, lot 41
| Case 134,692; 18ct pink gold; dated 1955; pink dial without chronometer line; Cal. 1055; President bracelet with clasp stamped 2.57. Sold for CHF 56,250.
|-
| Antiquorum New York, 2008, lot 81
| Yellow gold; dated 1956; 36mm; Cal. 1055; white dial, “Officially Certified Chronometer”; sold for USD 24,000.
|-
|-
| Phillips, Glamorous Day-Date, Geneva, lot 40
| Bonhams London, 2004, lot 156
| 9 May 2015
| Yellow gold; Glasgow import mark dated 1956; Cal. 1055; bracelet later hallmarked 1959. The lot remained unsold.
| yellow gold
| CHF 191,000
| case 111,654 (Q4 1955), full set with guarantee dated 7 May 1957, wallet and box; highest standard-gold result and earliest documented case
|-
|-
| Phillips, Glamorous Day-Date, Geneva, lot 41
| [https://www.dorotheum.com/de/l/604595/ Dorotheum Vienna, 2017, lot 318-029186/0001]
| 9 May 2015
| Ref. 6511/8; case 166744; listed circa 1965; Cal. 1055; approx. 35mm; silver-colored dial; bracelet explicitly described as not original. Its 259 × 400 px listing photograph is a front view; it cannot confirm the serial or movement. Sold for EUR 5,500.
| pink gold
| CHF 56,250
| case 134,692 (1955), pink dial with no chronometer line; confirms the pink-gold variant
|-
|-
| Monaco Legend, Exclusive Timepieces 35, lot 220
| Monaco Legend, 2023, lot 22
| 19 Oct 2024
| Case 111,695; listing field says 1955 while catalogue text says 1956; grey/patinated dial, Portuguese day disc; leather strap with Big Logo bracelet listed as accessory. Sold for EUR 33,750.
| yellow gold
| EUR 50,700
| case 166,725 (1956), original yellow-gold Jubilee, "50 m = 165 ft" dial
|-
|-
| Monaco Legend, Exclusive Timepieces 31, lot 22
| Monaco Legend, 2024, lot 220
| 22 Apr 2023
| Case 166,725; dated 1956; yellow gold; Cal. 1055; 36mm; red model text and depth marking; Jubilee bracelet. The [https://www.monacolegendauctions.com/auction/exclusive-timepieces-35/lot-220 lot page reports EUR 48,750]; the [https://www.monacolegendauctions.com/writable/media/auction/0035-0000/result_0035.pdf sale-results PDF reports EUR 50,700] including premium and VAT.
| yellow gold
| EUR 35,100
| case 111,695 (1956), grey patinated dial, Portuguese day disc
|-
|-
| Antiquorum, Revolution, New York, lot 81
| [https://www.dorotheum.com/en/l/10072651/ Dorotheum, 2026, lot 255]
| 17 Apr 2008
| Case 166736; model period listed as 1956–57; 18ct yellow gold, 36mm; white dial; movement DD35891 listed as Cal. 1555 with 25 jewels; chronometer certificate. Sold for EUR 20,800 including buyer's premium and VAT.
| yellow gold
| USD 24,000
| "Officially Certified Chronometer" dial; billed as the first yellow-gold 6511 at the house
|-
|-
| Bonhams, London, lot 156
| Monaco Legend, 2024, lot 110, steel prototype
| 23 Nov 2004
| Case 99,272; catalogue attributes it to 6511; result PDF reports EUR 1,196,000 including premium and VAT. The lot page currently displays EUR 1,150,000. The disputed reference and price belong to this prototype record, separate from standard-production examples.
| yellow gold
| unsold
| Glasgow import mark 1956; later 1959-hallmarked bracelet
|}
|}


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.
==Related references==
 
* [[Reference:6510|6510]]: smooth-bezel member of the launch pair
* [[Reference:6611|6611]]: later launch-generation reference
* [[Reference:day-date|Day-Date family guide]]: wider chronology and shared history
* [[Reference:Movements|Movements]]: caliber descriptions and conflicts
* [[Reference:Serial-numbers|Serial numbers]]: case-number date estimates
* [[Reference:Bracelets|Bracelets]]: bracelet and clasp identification


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.
<gallery mode="packed" heights="180">
File:Ref 6511 hero.webp|Monaco Legend, 2024, lot 220: full watch.
File:Ref 6511 dial-detail.webp|Monaco Legend, 2024, lot 220: dial.
File:Ref 6511 bezel.webp|Monaco Legend, 2024, lot 220: bezel.
File:Ref 6511 caseback.webp|Monaco Legend, 2024, lot 220: caseback.
File:Ref 6511 bracelet.webp|Monaco Legend, 2024, lot 220: bracelet.
File:Ref 6511 clasp.webp|Monaco Legend, 2024, lot 220: clasp.
</gallery>


==Sources==
== Sources ==


* ''The Vintage Rolex Field Manual'' — Colin A. White, Morning Tundra
* [https://www.rolex.com/about-rolex/history/1953-1967 Rolex, "Rolex History: 1953–1967", Rolex]
* [https://mondanibooks.com/rolex-day-date-history/ ''Rolex Day-Date Volume (Mondani Editore)'' — Mondani Family, Guido Mondani Editore]
* [https://www.rolexmagazine.com/2008/06/original-yellow-gold-rolex-day-date.html Jake Ehrlich, "Jake Ehrlich, Early Yellow Gold Rolex Day-Date from the 1950s", RolexMagazine.com (Jake's Rolex World), 2008-06]
* [https://www.puccipapaleo.com/bookstore/day-date/ ''Day-Date — The Presidential Rolex'' — Pucci Papaleo Editore, Spin Edizioni, 2015-05]
* [https://www.sothebys.com/ Sotheby's editorial, "The Rolex Day-Date: A Complete Collector's Guide", Sotheby's]
* [https://monochrome-watches.com/history-rolex-day-date-1956-present-president-watch-in-depth-review/ Monochrome editorial, "In-Depth: The History of the Rolex Day-Date, The Presidential Watch", Monochrome Watches]
* [https://www.fratellowatches.com/rolex-day-date-historical-overview-of-rolexs-flagship/ Fratello editorial, "Rolex Day-Date — Historical Overview Of Rolex's Flagship", Fratello Watches]
* [https://watchbase.com/blog/2015/02/21/rolex-day-date-history WatchBase editorial, "Rolex Day-Date History", WatchBase, 2015-02-21]
* [https://robbreport.com/style/watch-collector/lists/rolex-day-date-guide-1237586374/ Robb Report editorial, "The Rolex Day-Date: a Guide to Everything You Need to Know", Robb Report]
* [https://www.rolexmagazine.com/2010/09/1956-very-first-rolex-day-date.html Jake Ehrlich, "1956 — The Very First Rolex Day-Date", Rolex Magazine (Jake's Rolex World), 2010-09]
* [https://italianwatchspotter.com/the-history-of-the-rolex-day-date/?lang=en Italian Watch Spotter editorial, "The History of the Rolex Day-Date", Italian Watch Spotter]
* [https://www.collectorsquare.com/en/watches/rolex/day-date/ref-rolex-6511/lpi Collectors Square editorial, "Rolex Day-Date Ref. 6511 — auction price index and lot listings", Collectors Square]
* [https://www.phillips.com/detail/rolex/CH080115/40 Phillips (in association with Bacs & Russo), "Rolex Ref. 6511, yellow gold, Phillips Glamorous Day-Date lot 40", Phillips, 2015-05-09]
* [https://www.phillips.com/detail/rolex/CH080115/40 Phillips (in association with Bacs & Russo), "Rolex Ref. 6511, yellow gold, Phillips Glamorous Day-Date lot 40", Phillips, 2015-05-09]
* [https://www.phillips.com/detail/rolex/CH080115/41 Phillips (in association with Bacs & Russo), "Rolex Ref. 6511, pink gold, Phillips Glamorous Day-Date lot 41", Phillips, 2015-05-09]
* [https://www.phillips.com/detail/rolex/CH080115/41 Phillips (in association with Bacs & Russo), "Rolex Ref. 6511, pink gold, Phillips Glamorous Day-Date lot 41", Phillips, 2015-05-09]
* [https://catalog.antiquorum.swiss/en/lots/rolex-lot-204-81 Antiquorum, "Rolex Ref. 6511, yellow gold, Antiquorum Revolution: The Evolution of the Rolex Sport Watch lot 81", Antiquorum, 2008-04-17]
* [https://catalog.antiquorum.swiss/en/lots/rolex-lot-204-81 Antiquorum, "Rolex Ref. 6511, yellow gold, Antiquorum Revolution: The Evolution of the Rolex Sport Watch lot 81", Antiquorum, 2008-04-17]
* [https://www.bonhams.com/auctions/10769/lot/156/ Bonhams, "Rolex Ref. 6511, 18ct gold, Glasgow import mark 1956, Bonhams lot 156", Bonhams, 2004-11-23]
* [https://www.bonhams.com/auctions/10769/lot/156/ Bonhams, "Rolex Ref. 6511, 18ct gold, Glasgow import mark 1956, Bonhams lot 156", Bonhams, 2004-11-23]
* [https://www.monacolegendauctions.com/auction/exclusive-timepieces-31/lot-22 Monaco Legend Auctions, "Rolex Ref. 6511, yellow gold, Monaco Legend Exclusive Timepieces 31 lot 22", Monaco Legend Auctions, 2023-04-22]
* [https://www.monacolegendauctions.com/auction/exclusive-timepieces-35/lot-220 Monaco Legend Auctions, "Rolex Ref. 6511, yellow gold on Jubilee, Monaco Legend Exclusive Timepieces 35 lot 220", Monaco Legend Auctions, 2024-10-19]
* [https://www.monacolegendauctions.com/auction/exclusive-timepieces-35/lot-220 Monaco Legend Auctions, "Rolex Ref. 6511, yellow gold on Jubilee, Monaco Legend Exclusive Timepieces 35 lot 220", Monaco Legend Auctions, 2024-10-19]
* [https://www.monacolegendauctions.com/auction/exclusive-timepieces-31/lot-22 Monaco Legend Auctions, "Rolex Ref. 6511, yellow gold, Monaco Legend Exclusive Timepieces 31 lot 22", Monaco Legend Auctions, 2023-04-22]
* [https://www.monacolegendauctions.com/writable/media/auction/0035-0000/result_0035.pdf Monaco Legend Auctions, "Monaco Legend Exclusive Timepieces 35, official results", Monaco Legend Auctions, 2024-10-19]
* [https://www.monacolegendauctions.com/auction/exclusive-timepieces-35/lot-110 Monaco Legend Auctions, "Rolex steel Day-Date prototype sold as Ref. 6511 (ex-Goldberger), Monaco Legend lot 110", Monaco Legend Auctions, 2024-10-19]
* [https://www.monacolegendauctions.com/auction/exclusive-timepieces-35/lot-110 Monaco Legend Auctions, "Rolex steel Day-Date prototype sold as Ref. 6511 (ex-Goldberger), Monaco Legend lot 110", Monaco Legend Auctions, 2024-10-19]
* [https://www.collectorsquare.com/en/watches/rolex/day-date/ref-rolex-6511/lpi Christie's, "Rolex Ref. 6511, pink gold black tropical dial, Christie's Watches Online Geneva", Christie's, 2021-11-16]
* [https://www.dorotheum.com/en/l/10072651/ Dorotheum, "Dorotheum, Day-Date ref. 6511, lot 255", Dorotheum, 2026-05-05]
* [https://www.dorotheum.com/de/l/604595/ Dorotheum, "Dorotheum, Day-Date ref. 6511/8, lot 318-029186/0001", Dorotheum, 2017-08-17]
* [https://rolexhaven.com/serial-numbers.html RolexHaven (anonymous specialist), "RolexHaven — Serial Numbers (Pergola + Dowling charts photographed)", rolexhaven.com]
* [https://www.phillips.com/detail/rolex/CH080219/247 Phillips, "Phillips, Geneva Watch Auction X, lot 247, experimental steel Day-Date", Phillips]
* [https://monochrome-watches.com/history-rolex-day-date-1956-present-president-watch-in-depth-review/ Monochrome editorial, "In-Depth: The History of the Rolex Day-Date, The Presidential Watch", Monochrome Watches]
* [https://www.sothebys.com/en/articles/the-rolex-day-date-a-complete-collectors-guide Sotheby's editorial, "The Rolex Day-Date: A Complete Collector's Guide", Sotheby's]


[[Category:Day-Date]]
[[Category:Day-Date]]
[[Category:working-draft]]
[[Category:References]]

Latest revision as of 11:31, 11 October 2026

Day-Date → 6511

Yellow-gold Day-Date 6511 with a silver dial and Jubilee bracelet
Monaco Legend, 2024, lot 220; case 166,725.

The 6511 is the fluted-bezel member of the first Day-Date pair, alongside the smooth-bezel 6510. Rolex dates the Day-Date launch to 1956, while Phillips catalogs two 6511 cases as made in 1955. Auction records document yellow- and pink-gold cases, several dial layouts, and movement and bracelet combinations that vary by watch. These lots give examples, not a complete specification for the reference.

Core facts

detail value
reference 6511
model Day-Date, with the day spelled out at 12 and date at 3
bezel fluted; often called “Millerighe” in auction catalogues
launch Rolex dates the Day-Date debut to 1956; references 6510 and 6511 are commonly treated as the launch pair
production dates Monochrome dates the 6510/6511 pair to 1956–57; Sotheby’s says the pair lasted one year before the 6611. Auction catalogues date individual cases to 1955, 1956, and 1956–57.
case 36mm tonneau-shaped Oyster case in most cited lots; Dorotheum's 2017 listing gives approximately 35mm. Antiquorum describes a screw-down crown and caseback.
materials documented below 18ct yellow gold and 18ct pink gold
movement Phillips lot 40 and Dorotheum lot 255 list 1555; six other located non-prototype lots list 1055. The movement in each watch needs individual confirmation.
dial wording Examples include red “DAY-DATE,” “Officially Certified Chronometer,” and a pink dial catalogued without a chronometer line
bracelet Auction lots and a contemporary collector article document President, Jubilee, Big Logo, leather, and brick-link combinations. Original delivery remains watch-specific.
crystal Monochrome describes acrylic crystals on Day-Dates of this era; the early lot descriptions inspected here are mostly silent about the material

Place in the line

Sotheby’s and Monochrome identify the 6510 and 6511 as the 1956 launch pair, with a smooth or domed bezel on the 6510 and a fluted bezel on the 6511. Surviving examples also vary in dial inscriptions, movement labels, and bracelets.

Rolex dates the Day-Date debut and the President bracelet’s unveiling to 1956. Erik Slaven’s Monochrome history says the 6510 and 6511 came on Jubilee bracelets before the President became standard with the 6611. Jake Ehrlich’s Rolex Magazine describes a pictured 6511 as “pre-Presidential” and shows it on a Jubilee. Phillips catalogs a 1955-dated 6511 with a President bracelet and clasp stamped 2.57. The clasp stamp dates that bracelet component; these records do not settle original delivery for every watch.

Production outline

The public launch was in 1956. Phillips dates case 111,654 to the fourth quarter of 1955 and case 134,692 to 1955. Monaco Legend lists case 111,695 as 1955 in its lot details, while its catalogue prose says 1956; the same house dates case 166,725 to 1956. Dorotheum dates case 166736 to 1956–57, but its 2017 listing dates case 166744 circa 1965. Pergola's unofficial chart puts 166744 in its 1956 band. The 2017 listing offers no readable view of the case number, leaving the catalogue date and serial chart in conflict.

Reference histories commonly date the 6611 from 1957; some auction descriptions place examples in 1956, leaving the transition year uncertain. The serial-number guide records the individual case estimates and the limits of generic serial charts.

Movement notes

Phillips lot 40 and Dorotheum lot 255 list Cal. 1555 for cases 111,654 and 166736. Phillips lot 41, Antiquorum lot 81, Bonhams lot 156, Monaco Legend lots 22 and 220, and Dorotheum's 2017 lot for case 166744 list Cal. 1055. Phillips's catalogue essay dates Cal. 1555 to 1959; Monochrome's Day-Date history places it with the later 1800-series generation. Those chronologies postdate the 1955 and 1956–57 dates assigned to cases 111,654 and 166736. A replacement movement or catalogue error could explain the 1555 labels, but the lot records leave the reason unresolved. Keep each attribution tied to its watch pending movement inspection. The disputed steel-prototype catalogue is a separate case and is excluded from this count.

The movement reference describes the 1055 family and its disputed details. Antiquorum’s 2008 description calls its 1055 free-sprung and specifies a Breguet balance spring; other sources place that balance revision later. Keep the description tied to lot 81 and check each watch's movement directly.

Dial map

These auction records document several dial layouts:

lot catalogue description
Phillips, 2015, lot 40; case 111,654 Champagne/gold dial with red “Day-Date” text at 6 and a red date wheel; the catalogue dates the case to Q4 1955 and lists Cal. 1555.
Phillips, 2015, lot 41; case 134,692 Pink dial with no chronometer-certification line; the lot description also records red-and-black date numerals and “Day-Date” text at 12.
Antiquorum, 2008, lot 81 White dial with “Officially Certified Chronometer,” applied gold batons, luminous dots and alpha hands. Antiquorum graded the dial separately; treat its wording as the house's description of this example.
Monaco Legend, 2024, lot 220; case 166,725 Silver/white dial with red “DAY-DATE” text and “50 m = 165 ft” depth marking. The catalogue also notes luminous dots.
Monaco Legend, 2023, lot 22; case 111,695 Grey/patinated dial and Portuguese day disc; the listing says the hour markers have no luminous dots. Its year field and catalogue prose disagree.
Dorotheum, 2026, lot 255; case 166736 White dial with day and date displays; its catalogue lists Cal. 1555 and a chronometer certificate.

Keep “factory dial” labels attached to their sale lots. Antiquorum grades one dial as good; Monaco Legend calls another patinated. A color change or unusual text needs independent evidence before it can define a factory variant. These records document several layouts; the full dial range has yet to be established.

Monaco Legend, 2024, lot 220: dial text and depth marking.

Case, bezel and crown

Auction houses describe the 6511 as a 36mm, tonneau-shaped Oyster case with a fluted bezel. Antiquorum’s lot 81 calls its case three-body and lists a screwed-down crown and caseback; Phillips describes its 1955 example as thicker and more curved than contemporary Datejust cases, with a rounded screw-down back. Treat these as lot descriptions rather than a complete construction record for the reference.

Phillips calls the early bezel “Millerighe”; “fluted” is the plain English term. Rolex says the Day-Date launched in 18ct gold or platinum. The located 6511 lots document yellow and pink gold. Other metals remain unverified.

  • Monaco Legend, 2024, lot 220: fluted bezel and case edge.
    Monaco Legend, 2024, lot 220: fluted bezel and case edge.
  • Monaco Legend, 2024, lot 220: exterior caseback; no case number is visible.
    Monaco Legend, 2024, lot 220: exterior caseback; no case number is visible.

Bracelets and clasps

Rolex says the President bracelet was made specially for the Day-Date and unveiled in 1956. Jake Ehrlich’s Rolex Magazine labels a pictured 6511 “pre-Presidential” and shows it on a Jubilee bracelet. Auction records also show mixed fitments: Phillips catalogues case 134,692 on a President bracelet with a clasp stamped 2.57; Monaco Legend describes case 166,725 on a Jubilee; and its 2023 case 111,695 was offered on a leather strap with a separate yellow-gold Big Logo bracelet listed among the accessories. Bonhams records another 6511 with a gold brick-link bracelet hallmarked 1959, three years after its stated 1956 Glasgow import mark. The available examples leave original delivery specific to each watch.

Dorotheum explicitly says the bracelet on its 2017 case 166744 is not original. A bracelet or clasp date belongs to that component. Date the watch head from its own evidence, and assess original delivery separately. The bracelet guide explains the distinction.

  • Monaco Legend, 2024, lot 220: Jubilee bracelet fitted to case 166,725.
    Monaco Legend, 2024, lot 220: Jubilee bracelet fitted to case 166,725.
  • Monaco Legend, 2024, lot 220: bracelet and clasp view; the image shows this lot, not universal fitment.
    Monaco Legend, 2024, lot 220: bracelet and clasp view; the image shows this lot, not universal fitment.

Steel prototype attribution

Monaco Legend sold case 99,272 as a steel 6511 prototype with a white-gold bezel and riveted Oyster bracelet. Other published histories assign the small steel Day-Date prototype group to reference 6611. Keep Monaco Legend’s 6511 attribution separate from the standard specification while the reference remains disputed.

Auction record

The table keeps sale-house descriptions and results attached to each lot. Both totals appear where a lot page and results PDF differ.

sale record catalogue details and result
Phillips, “Glamorous Day-Date,” 2015, lot 40 Case 111,654; 18ct yellow gold; dated Q4 1955; 36mm; red “Day-Date” text and red date wheel; movement listed as 1555. Sold for CHF 191,000.
Phillips, “Glamorous Day-Date,” 2015, lot 41 Case 134,692; 18ct pink gold; dated 1955; pink dial without chronometer line; Cal. 1055; President bracelet with clasp stamped 2.57. Sold for CHF 56,250.
Antiquorum New York, 2008, lot 81 Yellow gold; dated 1956; 36mm; Cal. 1055; white dial, “Officially Certified Chronometer”; sold for USD 24,000.
Bonhams London, 2004, lot 156 Yellow gold; Glasgow import mark dated 1956; Cal. 1055; bracelet later hallmarked 1959. The lot remained unsold.
Dorotheum Vienna, 2017, lot 318-029186/0001 Ref. 6511/8; case 166744; listed circa 1965; Cal. 1055; approx. 35mm; silver-colored dial; bracelet explicitly described as not original. Its 259 × 400 px listing photograph is a front view; it cannot confirm the serial or movement. Sold for EUR 5,500.
Monaco Legend, 2023, lot 22 Case 111,695; listing field says 1955 while catalogue text says 1956; grey/patinated dial, Portuguese day disc; leather strap with Big Logo bracelet listed as accessory. Sold for EUR 33,750.
Monaco Legend, 2024, lot 220 Case 166,725; dated 1956; yellow gold; Cal. 1055; 36mm; red model text and depth marking; Jubilee bracelet. The lot page reports EUR 48,750; the sale-results PDF reports EUR 50,700 including premium and VAT.
Dorotheum, 2026, lot 255 Case 166736; model period listed as 1956–57; 18ct yellow gold, 36mm; white dial; movement DD35891 listed as Cal. 1555 with 25 jewels; chronometer certificate. Sold for EUR 20,800 including buyer's premium and VAT.
Monaco Legend, 2024, lot 110, steel prototype Case 99,272; catalogue attributes it to 6511; result PDF reports EUR 1,196,000 including premium and VAT. The lot page currently displays EUR 1,150,000. The disputed reference and price belong to this prototype record, separate from standard-production examples.

Related references

  • Monaco Legend, 2024, lot 220: full watch.
    Monaco Legend, 2024, lot 220: full watch.
  • Monaco Legend, 2024, lot 220: dial.
    Monaco Legend, 2024, lot 220: dial.
  • Monaco Legend, 2024, lot 220: bezel.
    Monaco Legend, 2024, lot 220: bezel.
  • Monaco Legend, 2024, lot 220: caseback.
    Monaco Legend, 2024, lot 220: caseback.
  • Monaco Legend, 2024, lot 220: bracelet.
    Monaco Legend, 2024, lot 220: bracelet.
  • Monaco Legend, 2024, lot 220: clasp.
    Monaco Legend, 2024, lot 220: clasp.

Sources

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