Reference:16760

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GMT-Master -> 16760

The 16760 is the first GMT-Master II. It introduced the independently adjustable 24-hour hand — the first Rolex caliber to dissociate the local hour hand from the 24-hour hand and the mechanism that turned the bezel into a third-time-zone tool instead of a second-time-zone aid. The independent-hand module added 6.3mm of caliber thickness, and the case grew around it. That thickness drove both collector nicknames: "Fat Lady" and the kinder "Sophia Loren," after the actress's curves. Production ran 1983 to 1988 across the dominant editorial reading. Caliber 3085, 27 jewels, 28,800 vph. Coke bezel exclusive.

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Fat Lady GMT-Master II

Core facts

detail value
reference 16760
family GMT-Master II (first generation)
production 1983 to 1988 (Monochrome, Timeline.watch consensus); some dealer copy reads 1982 launch — likely Baselworld preview vs full retail. The Vintage Rolex Field Manual gives 1983-1987.
total examples no published figure across any source — open question
case 39.14mm wide ex-crown, 47.6mm lug-to-lug, 12.6mm thick ; 100m water resistance. Approximately 0.6–1.0mm thicker than the 16710 that succeeded it.
crown 7mm screw-down with crown guards
crystal sapphire with Cyclops — first GMT with sapphire crystal
movement caliber 3085, 27 jewels, 28,800 vph (4 Hz), 48-hour reserve. 28.5mm × 6.3mm thick. COSC chronometer, hacking, Microstella regulation, Breguet hairspring, Kif shock. First Rolex caliber with independent local hour hand
trade-off no quick-set date — date advances via the local hour hand
bezel red-and-black insert only — no other factory configuration
dial always glossy lacquer with white-gold-surround applied indices from launch — no matte 16760 dials documented as factory
bracelet 78360 Oyster with 501B hollow stamped end-links, period-correct throughout the run; Jubilee 62510H with 502B optional

Where it sits in the line

The 16760 creates the functional split inside the GMT-Master family. With the independent 24-hour hand it turns the GMT-Master II into a true three-time-zone travel watch, which is why the reference matters past the nickname. Before the 16760, the GMT-Master line ran on the older "caller" mechanic — the 24-hour hand tracking the local hour hand rather than moving on its own. The 16750 is the immediate predecessor on the caller side; the 16700 is the late-life caller refresh that ran concurrently with the 16710 GMT-Master II from 1989 onward. The 16710 (1989-2007) replaced the 16760 with the slimmer caliber 3185, returning to "more slender, graceful bodywork" (Monochrome).

The 16760 ran for five years, the shortest production span of any GMT-Master reference. The 16710 succeeded it in 1989 with the new caliber 3185, which slimmed the case by approximately a millimeter and reintroduced the quick-set date that the 3085's hand-set logic had removed.

Production outline

The 16760 ran 1983 to 1988 across the dominant editorial reading. Some dealer copy pushes launch back to 1982, likely conflating Baselworld preview with full retail. The Vintage Rolex Field Manual gives 1983-1987. The cleanest single sentence: introduced 1983, in production through 1988, replaced by the 16710 in 1989.

Total production output is not published anywhere in the editorial or auction literature. The reference is consistently described as rare, uncommon, and short-run without a serial-bracket estimate. Treat as an open question rather than printing a guess.

Movement notes

Caliber 3085 is the reason the reference exists. Specifications converge across the published literature: 27 jewels, 28,800 vph (4 Hz), 48-hour power reserve, 28.5mm diameter, 6.3mm thick. Adjusted to five positions and temperature, COSC chronometer-rated. Breguet hairspring, Microstella regulation, Kif shock protection, hacking seconds.

The 3085 is the first Rolex caliber to dissociate the local hour hand from the 24-hour hand. The local hour hand sets in one-hour increments via the crown; the 24-hour hand follows the bezel for the third time zone. The trade-off was loss of quick-set date — on the 3085 the date advances via the local hour hand. The caliber's 6.3mm height drove the case proportions and the "Fat Lady" nickname (Millenary explicitly attributes the nickname to the movement thickness).

The 3085 ran in the Explorer II 16550 and the GMT-Master II 16760 only. Production span of the movement itself: 1983 to 1989. The 3185 replaced it on the 16710 with a slimmer profile and quick-set date restored.

A small contradiction surfaces in the 3085-vs-3185 service-replacement question. Some service-period reads claim late-fitment 3185 in some 16760 cases, but every consulted auction catalog (Phillips Geneva X, Sotheby's HK, Bonhams Knightsbridge, both Christie's online lots) describes a 3085 in the 16760, including 1988-dated examples. The most likely reading is that Bernard's brief conflates Rolex's service-era movement swaps with original fitment — 3185 swaps appear when an entire movement is replaced at service, not as factory variation. Capture as disputed pending primary archive confirmation.

Dial map

Coke 16760
Coke 16760

Two consistent threads run across the published documentation. The 16760 was always fitted with a glossy lacquer dial with applied white-gold-surround indices from launch — specialist registries are explicit, and no matte 16760 dial is recognised as factory. The rolexforums "Matte Dial on a 16760?" thread shows collector skepticism toward any matte example. Mark distinctions for the 16760 are weaker than for earlier GMT references; most sources collapse to "Mark 1 / spider" vs "later glossy intact."

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.

Spider dial (Mark 1)

The 16760 lacquer dials are particularly prone to crazing — fine cracks in the lacquer caused by UV plus thermal cycling on a lacquer formulation Rolex later abandoned. Specialist registries catalog a 16760 as "Mark 1 Spider Dial." Wannabuyawatch and spider-dial 16760 examples from 1984. Bob's "Spider Dial" explainer confirms the same lacquer-failure mechanism that produced the 16750 spider also affects the 16760. Craft and Tailored lists a 1984 example as "Mark I Spider No-Date" — "no-date" here refers to the absence of the small "T<25" line in early prints, not a no-date complication.

Aging and gloss-loss

Glossy dials shift toward a matte appearance with age — Bob's notes this is a surface-condition phenomenon, not a factory variant. A matte-looking dial on a 16760 is most often original gloss with decades of aging; gloss-loss is not automatic evidence of refinishing. Spider crack patterns and the integrity of the white-gold surrounds are the primary originality tells.

Case, bezel, crystal, and crown

Fat Lady case profile
Fat Lady case profile

The case carries the headline 40mm GMT-Master Oyster footprint at 39.14mm wide ex-crown, 47.6mm lug-to-lug, 12.6mm thick (specialist documentation). The 16760 is approximately 0.6–1.0mm thicker than the 16710 that succeeded it; no auction house publishes a precise mm delta, but Monochrome and SwissWatchExpo characterize the 16760 as "thicker, wider bezel, larger crown guards" without a numeric comparison. The 6.3mm caliber 3085 underneath is the geometry driver.

The crystal is sapphire with Cyclops — the 16760 is the first GMT-Master with a sapphire crystal. Water resistance is 100m. The crown is the screw-down 7mm with crown guards. Case construction follows the standard mid-1980s Rolex Oyster pattern; the only meaningful visual difference vs the 16710 is the thicker midcase and slightly broader crown guards.

Factory delivery is the red-and-black insert, exclusive to this reference. The Field Manual gives "black or Coke" and the Sotheby's GMT-Master guide reads "Pepsi or Coke," but the major-house lot record carries no non-Coke factory example — those readings are published-source disagreement rather than factory variation. Dealer-fitted insert swaps onto factory-Coke cases circulate in the trade. Faded inserts on surviving original examples are common.

Bracelets, end links, clasps, and packaging notes

Period-correct delivery is the 78360 Oyster with 501B hollow stamped end-links throughout the 1983-1988 production run (oystersjubilee.com fitting guide;). The Jubilee 62510H with 502B end-links was an option. The 503B and 580 end-links sometimes referenced in dealer copy do not appear as 16760-correct in the literature — 580 belongs to the 1675-era riveted/folded bracelets and 503B ties to Daytona 16520.

Service-era replacements turn up frequently on surviving examples. Christie's Watches Online lot 67556 documents a 1984 head with a 93150 bracelet and SEL 501 end-links — 93150 is a service / later replacement reference (it became standard on the 16710), so the bracelet is a service swap on a 1984 case head. Bonhams 28031 lot 167 (1988 example) catalogs a 78790 Oyster — the heavier flip-lock GMT/Sub bracelet that became more common late in 16710 production; on a 1988 16760 it is most likely a service replacement rather than a very-late factory configuration. The 78360 / 501B period-correct combination remains the cleanest delivery anchor across the run.

Nicknames — Fat Lady and Sophia Loren

Both nicknames derive from the case proportions driven by the 6.3mm caliber 3085. "Fat Lady" is the older and more widely-used name; "Sophia Loren" is the politer market rebrand that points at the same case thickness through the actress's curves rather than her weight. Bob's "5 Firsts" notes both nicknames coexist in collector usage. The Phillips Geneva Watch Auction X (November 2019) catalog is the earliest dated print attribution in the surveyed sample to pair both names: "dubbed the 'Fat Lady' or 'Sophia Loren', the name comes from the elegant curves of its generously enhanced proportions." Sotheby's 2021 Hong Kong catalog echoes the same framing. Pre-2019 attribution exists in undated forum and dealer text; the first-print history has not been pinned to a specific writer.

Historical market and auction record

1985 Coke 16760
1985 Coke 16760
Sale Lot Year Serial / config Notes
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)
Sotheby's Important Watches HK 2004 2021 c.1984, case 8463283, cal. 3085 27j, Coke bezel est. HKD 80,000–120,000
Christie's Watches Online (NY) 67556 2019 c.1984, bracelet 93150 SEL 501 (service-era replacement), hands later replacements
Christie's Watches Online: Geneva Edit 133994 2019 c.1988, "Fat Lady because Rolex made the cases and crown guards thicker"
Christie's New York 41 2019 c.1988, full set with two extra links, hang tags, presentation box
Bonhams Knightsbridge 28031/167 2023 c.1988, case R275863, mvt 1994435, bracelet 78790 (service replacement), 2015 service guarantee GBP 10,837.50 incl. premium

The Phillips Geneva X 2019 result of CHF 20,000 against a CHF 6,000–12,000 estimate is the highest documented public hammer. Antiquorum's GMT-Master II catalogue tilts heavily to 16710 / 16713 / 16718; 16760 lots have not surfaced through the house in significant numbers. Surviving market records run through dealer listings rather than major auction lots in many cases. An early example anchors the nickname and the thick-case story. A documented 1985 example adds 3085 provenance with original packaging and service card. A 1988 example carries the same case identity through the end of the run.

The market reads the 16760 as a five-firsts watch — first GMT-Master II, first independently adjustable 24-hour hand, first red-and-black configuration on the line, first sapphire crystal, first white-gold-surround indices on a GMT — and prices it at the top end of the early ceramic-era market for clean original-condition examples.

Sources

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