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Reference:16760: Difference between revisions

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Deep correctness and anti-slop audit: Reference 16760
Deep audit: ground 16760 chronology, caliber, Coke insert, and auction claims
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{{DISPLAYTITLE:Rolex 16760 GMT-Master II}}
{{DISPLAYTITLE:Rolex 16760 GMT-Master II}}
{{#seo:
{{#seo:
|title=Rolex GMT-Master II 16760 'Fat Lady', Coke Bezel, 1983–1988 | Rolexopedia
|title=Rolex GMT-Master II 16760, first-generation independent-hour GMT | Rolexopedia
|description=The 16760 is the first GMT-Master II. Caliber 3085 lets the local hour hand jump independently while the 24-hour hand keeps reference time. The 16760 ran approximately 1982/83–1988 with a sapphire crystal and red-and-black aluminium bezel.
|description=The Rolex 16760 is the first GMT-Master II, with caliber 3085, an independently adjustable local-hour hand, sapphire crystal, and documented red-and-black aluminium bezel.
|keywords=Rolex, 16760, GMT-Master II, Fat Lady, Sophia Loren, caliber 3085, Coke bezel, independent hour hand
|keywords=Rolex, 16760, GMT-Master II, Fat Lady, Sophia Loren, caliber 3085, Coke bezel, independent hour hand
|image=Ref 16760 hero.webp
|image=Ref 16760 hero.webp
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</div>


The 16760 is the first GMT-Master II. Its caliber 3085 lets the local hour hand jump independently while the 24-hour hand keeps reference time, so the rotating bezel can show a third zone. The 6.3mm movement required a thicker case than the later 16710. Most reference guides date the run to approximately 1982/83–1988. Surviving factory examples are documented with the red-and-black aluminium “Coke” insert.
The 16760 is the first GMT-Master II. Its caliber 3085 lets the local hour hand jump independently while the 24-hour hand keeps reference time, so the rotating bezel can show a third zone. The 6.3mm movement required a thicker case than the later 16710. Rolex historical material and specialist references date the run to approximately 1982/83–1988. Surviving factory examples are documented with the red-and-black aluminium “Coke” insert.


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Caliber 3085 is the mechanical change that defines the reference. Published guides give 27 jewels, 28,800 vph, hacking seconds, an approximately 48-hour reserve, and independent local-hour adjustment. Auction and movement references also describe Microstella regulation and COSC certification; individual service condition still needs to be checked.
Caliber 3085 is the mechanical change that defines the reference. Published guides give 27 jewels, 28,800 vph, hacking seconds, an approximately 48-hour reserve, and independent local-hour adjustment. Auction and movement references also describe Microstella regulation and COSC certification; individual service condition still needs to be checked.


It is the first GMT caliber in the line to separate the local hour hand from the 24-hour hand. The local hand jumps in one-hour increments from the crown while the 24-hour hand runs against the bezel for a third zone. The date advances through the local-hour hand rather than a separate quick-set position. The movement's thickness explains the larger case.
It is the first GMT-Master caliber in the line to separate the local hour hand from the 24-hour hand. The local hand jumps in one-hour increments from the crown while the 24-hour hand runs against the bezel for a third zone. The date advances through the local-hour hand rather than a separate quick-set position. The movement's thickness explains the larger case.


Rolex also used caliber 3085 in the Explorer II 16550. The 16710 moved to the slimmer 3185 generation in 1989.
Rolex also used caliber 3085 in the Explorer II 16550. The 16710 moved to the slimmer 3185 generation in 1989.
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=== Standard glossy with WG surrounds ===
=== Standard glossy with WG surrounds ===


Black lacquer ground, applied indices with white-gold surrounds, white printing for the dial text including the GMT-Master II line. Mercedes hour and minute hands paired with a red GMT hand. The configuration runs unchanged across the production window. Retailer-signed examples exist on top of that standard dial: Antiquorum catalogued a steel 16760 retailed by Tiffany & Co. in Geneva in November 2021, the Tiffany signature printed below the coronet in the standard position, with no other deviation from the factory dial layout.
Black lacquer ground, applied indices with white-gold surrounds, white printing for the dial text including the GMT-Master II line. Mercedes hour and minute hands paired with a red GMT hand. The basic glossy layout is documented across the production window, although details and service history vary by example. Retailer-signed examples exist on top of that standard dial: Antiquorum catalogued a steel 16760 retailed by Tiffany & Co. in Geneva in November 2021, the Tiffany signature printed below the coronet in the standard position, with no other deviation from the factory dial layout.


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The crystal is sapphire with a Cyclops over a 100m Oyster case. A 7mm screw-down crown sits between the guards. The thicker midcase and larger crown guards help distinguish it from a 16710, but they are not authentication on their own.
The crystal is sapphire with a Cyclops over a 100m Oyster case. A 7mm screw-down crown sits between the guards. The thicker midcase and larger crown guards help distinguish it from a 16710, but they are not authentication on their own.


The documented factory configuration is the red-and-black aluminium “Coke” insert. Some secondary references list other colours, but the auction examples and specialist guides cited here do not establish a non-Coke factory branch. Replacement inserts circulate, so colour alone cannot authenticate a case.
The cited auction examples and specialist guides document the red-and-black aluminium “Coke” insert. Other colours appear in secondary listings, but the available evidence does not establish a separate factory branch. Replacement inserts circulate, so colour alone cannot authenticate a case.


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! Sale !! Lot !! Year !! Serial / config !! Notes
! Sale !! Lot !! Year !! Serial / config !! Notes
|-
|-
| Antiquorum Geneva || 344-411 || 2021 || Tiffany & Co.-retailed, steel || CHF 40,000 (est. CHF 10,000–15,000) -- highest documented public hammer
| Antiquorum Geneva || 344-411 || 2021 || Tiffany & Co.-retailed, steel || CHF 40,000 (est. CHF 10,000–15,000); highest result in the reviewed sample
|-
|-
| Phillips Geneva Watch Auction X || 149 || 2019 || c.1988, case R434190, mvt 2102621, full set with Merksamer Jewelers guarantee || CHF 20,000 (est. CHF 6,000–12,000)
| Phillips Geneva Watch Auction X || 149 || 2019 || c.1988, case R434190, mvt 2102621, full set with Merksamer Jewelers guarantee || CHF 20,000 (est. CHF 6,000–12,000)
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The Antiquorum Tiffany & Co.-retailed example sold for CHF 40,000 against a CHF 10,000–15,000 estimate in November 2021. The lot's retailer signature and condition are part of that individual result; it is not a general value rule. The table is a limited auction sample, not a census of the reference's market.
The Antiquorum Tiffany & Co.-retailed example sold for CHF 40,000 against a CHF 10,000–15,000 estimate in November 2021, the highest result in the reviewed sample. The lot's retailer signature and condition are part of that individual result; it is not a general value rule. The table is a limited auction sample, not a census of the reference's market.


The reference's defining facts are the first GMT-Master II designation, the independent local-hour hand, the thicker caliber 3085 case, the sapphire crystal on the steel GMT, and the documented Coke insert. Originality and service history still have to be established on each watch.
The reference's defining facts are the first GMT-Master II designation, the independent local-hour hand, the thicker caliber 3085 case, the sapphire crystal on the steel GMT, and the documented Coke insert. Originality and service history still have to be established on each watch.
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