Reference:16750: Difference between revisions

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{{#seo:
{{#seo:
|title=Rolex GMT-Master 16750 — BezelBase
|title=Rolex 16750 GMT-Master — Production, Dial Variants, Serial Ranges | BezelBase
|description=The `16750` is the bridge reference in the GMT-Master line. It keeps the acrylic crystal, the older linked-hand GMT logic, and much of the `1675` look,…
|description=The 16750 is the first five-digit GMT-Master. Caliber 3075 brought 28,800 vph and quick-set date; the older caller-GMT logic stayed. 1981–1988, acrylic crystal, 100m, Pepsi or all-black bezel.
|keywords=Rolex, 16750, GMT-Master, specifications, reference guide
|keywords=Rolex, 16750, GMT-Master, caliber 3075, caller GMT, spider dial
|image=Ref 16750 hero.webp
|image_alt=Acrylic, linked-hand GMT
|type=article
|type=article
|og_type=article
|published_time=2026-04-18T03:21:26Z
|modified_time=2026-04-29T08:30:00Z
|robots=index,follow,max-image-preview:large
}}
}}


<small>[[Reference:gmt-master|GMT-Master]] -> '''16750'''</small>


<small>[[Reference:gmt-master|GMT-Master]] → '''16750'''</small>
The [[Reference:16750|16750]] is the first five-digit GMT-Master and the bridge between the 1675 and the 16760 / 16710 generation. Caliber 3075 raised the beat rate from 19,800 to 28,800 vph and added quick-set date, but the older caller-GMT mechanic stayed: the 24-hour hand tracks the local hour hand, the second time zone reads off the rotating bezel. The acrylic crystal stayed too. The result is a watch that lives mechanically halfway between the 1675 it replaced and the sapphire-era GMTs that followed.


[[File:Ref 16750 hero.webp|thumb|right|340px]]
<span id="core-facts"></span>
 
 
 
 
The [[Reference:16750|16750]] is the bridge reference in the GMT-Master line. It keeps the acrylic crystal, the older linked-hand GMT logic (in which the 24-hour hand tracks the local hour hand rather than moving on its own), and much of the [[Reference:1675|1675]] look, but adds the faster caliber 3075 and a quick-set date. The combination makes it one of the most useful references in the family: still plainly vintage, but much less of a chore to live with.


The reference is also not a single watch. Early matte-dial examples still feel very close to late 1675s. Later watches move into glossy dials with white-gold surrounds, and some of those later glossy dials age into the hairline-cracking "spider" patterns that define part of the reference's collector identity.
[[File:Ref 16750 hero.webp|thumb|right|250px|alt=Acrylic, linked-hand GMT|Acrylic, linked-hand GMT]]


<span id="core-facts"></span>
== Core facts ==
== Core facts ==


Line 33: Line 34:
|-
|-
| production
| production
| roughly 1979-1988
| 1981 to 1988 (dominant editorial reading); 1979/1980 launch surfaces in some specialist sources. Earliest primary anchor in major-house lots is a documented 27 April 1981 retailer receipt
|-
|-
| movement
| total examples
| caliber 3075
| no published Rolex production figure. Run length is eight years against the 1675's twenty-one — the 16750 is meaningfully scarcer
|-
|-
| case
| case
Line 46: Line 47:
| water resistance
| water resistance
| 100m
| 100m
|-
| movement
| caliber 3075 — 27 jewels, 28,800 vph, 48-hour reserve. Free-sprung Microstella balance with Breguet overcoil, hacking seconds, quickset date. 28.5 × 6.2mm. Hand-stack order changed from the 1575GMT to hour / GMT / minute / second
|-
| GMT mechanic
| caller GMT — 24-hour hand stays linked to the local hour hand, second zone reads off the bezel
|-
| dial generations
| matte (early, ~1981–1985) → glossy lacquer with applied white-gold-circled tritium indices (~1986 onward); the transition is overlapping rather than a hard cutover, with 1984 examples documented in both finishes
|-
|-
| bezel
| bezel
| bidirectional 24-hour aluminum insert, most often Pepsi or black
| bidirectional 24-hour aluminium insert in Pepsi or all-black. Coke is a 16760 trait, not a 16750 option
|-
|-
| main dial split
| bracelet
| early matte, later glossy white-gold-surround
| 78360 Oyster with 580 endlinks period-correct; Jubilee 62510H with 501 endlinks optional
|-
|-
| successor
| successor
| [[Reference:16700|16700]]
| [[Reference:16700|16700]] caller GMT (1988–1999) and the [[Reference:16760|16760]] flyer GMT-Master II (1983–1988) running concurrently after 1983
|}
|}


Line 60: Line 70:
== Where it sits in the line ==
== Where it sits in the line ==


The 16750 follows the long 1675 run and sits just before the last GMT-Master, the [[Reference:16700|16700]]. It matters because it is the first five-digit GMT-Master but not yet a GMT-Master II. The caliber 3075 brought a higher beat rate and quick-set date to the reference, but Rolex kept the older linked-hand GMT logic rather than adopting the independently adjustable hour hand that would arrive on the [[Reference:16760|16760]].
The 16750 follows the long 1675 run and is the first GMT-Master with a five-digit reference number. It runs for eight years and ends in 1988, the same year the [[Reference:16760|16760]] retires. The 16760 brings the independent local hour hand and the flyer-GMT mechanic; the 16750 keeps the older linked-hand caller mechanic that defines the original GMT-Master line. The 16700 takes the caller mechanic forward into 1999 with the sapphire crystal and the slightly different caliber 3175.


The reference feels transitional in a useful way rather than in a vague collector-cliche way. Mechanically it is more modern than a 1675, but it still behaves like a GMT-Master rather than a GMT-Master II.
The 16750 is more modern than a 1675 — quickset date, higher beat rate, hacking — but mechanically it still behaves like a GMT-Master rather than a GMT-Master II. The acrylic crystal and the 40mm crown-guard case look modern next to the 1675 but read as vintage next to the sapphire-and-flyer 16710 that follows the 16760.


<span id="production-outline"></span>
<span id="production-outline"></span>
== Production outline ==
== Production outline ==


The easiest way to read the 16750 is in two halves.
Production ran approximately 1981 to 1988 across the dominant editorial reading. A specialist split surfaces on the launch year — some specialist sources push it back to 1979 or 1980. The earliest primary-document anchor is a 27 April 1981 retailer receipt accompanying a documented full-set Bonhams lot in 2024. Catalogued examples dated 1980 surface in the auction record (Sotheby's 2020 lot 109), so the 1980 reading is not unsupported, but the bulk of surviving examples date 1981 onward.


<span id="early-matte-watches"></span>
No published Rolex production figure surfaces in the surveyed sources. The eight-year run versus the 1675's twenty-one years implies meaningfully smaller volume — collectors describe the 16750 as "particularly scarce" against the 1675, with matte-dial examples covering only roughly the first four to five years of the run.
=== Early matte watches ===


The early matte-dial watches stay closest to the late 1675 in feel. Matte dials, acrylic crystals, and the same general visual balance make them the reference's most obviously transitional expression.
<span id="movement-notes"></span>
== Movement notes ==


<span id="later-glossy-watches"></span>
[[File:Ref 16750 movement.webp|thumb|right|280px|alt=Caliber 3075 in 16750|Caliber 3075 in 16750]]
=== Later glossy watches ===


Later watches move into glossy dials with white-gold surrounds. The reference starts to look more like a modern Rolex here, while still staying on an acrylic platform.
Caliber 3075 is the headline upgrade over the 1575GMT it replaces. Specifications: 27 jewels, 28,800 vph (up from 19,800 vph), 48-hour power reserve, hacking seconds, quickset date through the crown. Free-sprung Microstella balance with Breguet overcoil. 28.5mm diameter, 6.2mm thick. Some specialist movement registries quote ~50-hour reserve; the 48-hour figure is the more conservative reading.


The exact switch from matte to glossy is not perfectly clean. The Vintage Rolex Field Manual places the matte side roughly through 1983, with glossy white-gold-surround dials taking over through the remaining run into 1988. Monochrome draws the same broad line, and both sources treat the changeover as a production drift rather than a named cutoff. The documented 1984 watches already show both dial finishes in parallel, which is the clearest sign that the switch is not a clean serial break.
The hand-setting stack also changed from the 1575GMT — on the 3075 the order reads hour, GMT, minute, second from the centre post outward. Despite the higher beat rate and the quickset date, the 3075 retains the linked-hand caller-GMT mechanic. The 24-hour hand cannot be set independent of the local hour hand on the 16750. That step waited for the 3085 in the 16760 (1983) and the 3185 in the 16710 (1989).


Within the glossy side, two features matter enough to name outright. Some early glossy dials omit the word Date above GMT-Master, and some later glossy dials develop the hairline cracking collectors call a spider dial.
The 3075 is succeeded directly by the 3175 in the 16700 (1988–1999) — a one-reference caliber that retains the caller mechanic with minor revisions. Service-era movement swaps from 3075 to 3175 do circulate; the calibers do not behave identically across hand-setting and date-setting directions, and a 3175 in a 16750 case is a service replacement rather than original fitment.
 
<span id="movement-notes"></span>
== Movement notes ==
 
[[File:Ref 16750 movement.webp|thumb|right|280px|Caliber 3075 in 16750]]
Caliber 3075 is the real upgrade in the 16750. It brings quick-set date, a higher beat rate of 28,800 vph, and 100m water resistance on the steel watch.
 
The 16750 keeps the older GMT-Master operating logic: the 24-hour hand tracks the local hour hand and is not independently adjustable. The caliber does not turn the watch into a GMT-Master II, and the linked-hand behaviour is the cleanest way to separate the 16750 from the [[Reference:16760|16760]] that follows it.


<span id="dial-map"></span>
<span id="dial-map"></span>
== Dial map ==
== Dial map ==


[[File:Ref 16750 matte-pepsi.webp|thumb|right|280px|Matte-dial Pepsi 16750]]
Two dial generations cleanly mapped. The transition is overlapping rather than a hard cutover — 1984 examples surface in both matte and glossy finishes, so the year is the overlap zone rather than a clean hand-off.
[[File:Ref 16750 spider-dial.webp|thumb|right|280px|Glossy spider dial 16750]]
The dial story is the core of the reference.


<span id="matte-branch"></span>
<span id="matte-branch"></span>
=== Matte branch ===
=== Matte (early, ~1981–1985) ===


The matte-dial side is the watch most likely to be confused with a late 1675 at a glance, and the branch that collectors usually have in mind when they call the 16750 a true bridge reference.
[[File:Ref 16750 matte-pepsi.webp|thumb|right|280px|alt=Matte-dial Pepsi 16750|Matte-dial Pepsi 16750]]


<span id="glossy-branch"></span>
Matte black ground with painted indices, no white-gold surrounds. Closest visual link to the late-1675 dial. Tritium luminous compound across the run. The matte 16750 is the watch most likely to be misidentified at a glance as a late 1675; the caliber 3075's hand-stack order and the case-back interior reference number are the cleanest tells.
=== Glossy branch ===


Later dials move to a glossy finish with white-gold surrounds on the applied indices. The Vintage Rolex Field Manual adds one useful nuance here: some early glossy dials omit the word Date above GMT-Master at six o'clock, a simple but important subtype cue.
<span id="glossy-white-gold-surround"></span>
=== Glossy white-gold-surround (~1986 onward) ===


<span id="spider-branch"></span>
Glossy black lacquer with applied indices in white-gold surrounds. The surface treatment marks the modernization of the dial face — the same WG-surround applied-index format that runs forward into the 16760 and 16710. Tritium continues across this generation; the lume colour is consistent with the matte production and the same period mid-1980s tritium ageing pattern.
=== Spider branch ===


Not every glossy dial turns into a spider dial, but the reference is closely associated with the pattern. The current source set has one strong direct glossy example from Bob's Watches that shows both the white-gold surrounds and the no-Date wording together.
<span id="spider-dial"></span>
=== Spider crazing ===


Collectors use the word spider for a web-like cracking pattern that appears in the lacquer finish of glossy 16750 dials. Monochrome describes the effect as hairline cracking in the glossy coat rather than a factory-applied texture, and forum evidence on the closely related [[Reference:5513|5513]] dial process treats the same phenomenon as a natural aging outcome of the lacquered-dial recipe used across late-vintage Rolex sports watches. The practical reading across the corpus is consistent: the cracks are a service-age artifact, not a factory variant. Documented 16750 spider examples cluster around the mid-1980s, and the cracking is concentrated on the later glossy side of the run rather than the matte side. Collectors value the pattern because it only appears on surviving original dials, which makes it one of the few ways to anchor a later 16750 as an untouched example rather than a re-dialed or service-dialed one.
[[File:Ref 16750 spider-dial.webp|thumb|right|280px|alt=Glossy spider dial 16750|Glossy spider dial 16750]]
 
Not a separate factory variant. Hairline cracks form in the glossy lacquer over time — a manufacturing defect of the lacquer formulation Rolex used for the white-gold-surround dials before later reformulations. Affected dials were often replaced under service, so survivors with intact spider crazing carry a collector premium for original-dial integrity. The collector view of the pattern splits — some read it as patina, some as damage.


<span id="no-date-dial"></span>
<span id="no-date-dial"></span>
=== No-Date dial ===
=== No-Date wording variant ===


The no-Date wording variant sits inside the glossy branch rather than the matte one. The Vintage Rolex Field Manual flags it as a subtype cue, and the Bob's Watches 1984 spider example documents all three traits on one dial: white-gold surrounds, spider cracking, and no Date wording above GMT-Master at six o'clock. Later dials restored the Date line. The Vintage Rolex Field Manual treats the no-Date phase as early inside the glossy branch, which fits the observed pattern on surviving watches without amounting to a hard serial rule.
A small group of early glossy dials omit the word "Date" above "GMT-Master" at six o'clock. The variant belongs inside the early glossy branch rather than as a separate dial era. The omitted-Date layout is a documented sub-variant rather than a misprint.


<span id="service-drift"></span>
<span id="case-bezel-crystal-and-crown"></span>
=== Service drift ===
== Case, bezel, crystal, and crown ==


The black-bezel side of the reference also shows how messy survival can get. One documented black 16750 in the package has a Swiss-only service dial, a later service date wheel, and a later bracelet. The watch is not useless, but it is a cautionary example rather than a clean baseline.
The case is the standard 40mm Oyster with crown guards. The acrylic crystal — with the magnifying Cyclops over the date — is the cleanest single-glance separator from the sapphire-era GMTs that follow. The 100m water-resistance rating carries the 1675 specification forward unchanged.


<span id="case-bezel-crystal-and-crown-notes"></span>
The bezel is a bidirectional 24-hour aluminium insert. Pepsi and all-black are the only factory configurations on the steel 16750 — Coke (red and black) is a 16760 trait and not a documented 16750 option. Insert-back colour is not a clean dating tell on its own; early matte watches sometimes carry red-back inserts, later examples more often blue-back or service-era replacements.
== Case, bezel, crystal, and crown notes ==


The case is the familiar 40mm Oyster with crown guards, but the crystal is still acrylic. That distinction matters because it is the quickest way to separate the 16750 from later sapphire-era GMTs when moving through the family.
<span id="bracelets-end-links-clasps-and-packaging"></span>
 
The bezel palette is simpler than the later GMT-Master II run. Pepsi and plain black are the two standard branches.
 
The insert-back story is less clean. The Bob's Watches 1984 matte Pepsi example documents a red-back insert on an early production watch, which matches the vocabulary carried forward from the late 1675 era, where red-backed Pepsi inserts were the period-correct expectation. The Vintage Rolex Field Manual calls later 16750 inserts blue-backed. Both positions can be read in parallel: red-back inserts appear on earlier matte watches and carry the older look forward, while blue-back inserts are the later service-era or late-production format. The corpus is not deep enough yet to write a hard year cutoff, and individual inserts often cross branches through service swaps. The useful takeaway is that red-back and blue-back coexist inside the reference rather than cleanly separating it.
 
<span id="bracelets-end-links-clasps-and-packaging-notes"></span>
== Bracelets, end links, clasps, and packaging notes ==
== Bracelets, end links, clasps, and packaging notes ==


The current package shows two useful bracelet realities side by side: a matte Pepsi watch on Jubilee, and black and glossy spider examples on Oyster.
Period-correct delivery is the 78360 Oyster with 580 endlinks. Jubilee 62510H with 501 endlinks is the optional configuration. Earlier 580 endlinks are shared across the Submariner 5512 / 5513 / 1680 / 16800, Explorer 1016, and GMT-Master 1675 / 16750. Bracelet originality on a 16750 needs case-and-clasp-date verification rather than relying on the endlink stamp alone.


The 16750 is exactly the kind of reference where fitment and original delivery should be kept separate. The present source set is good enough to show what surviving watches commonly wear, but not good enough yet to turn those observations into a full born-with bracelet timeline.
Surviving examples wear both options. Matte Pepsi watches turn up on Jubilee more often than the glossy / black-bezel side; black and glossy-spider examples lean Oyster. Fitment as found at auction is not a reliable proxy for original delivery — the 1980s service window covers most surviving 16750s and bracelet swaps were common.
 
Packaging is stronger than it first looks. The matte Pepsi and glossy spider examples both come with box-and-paper material, and the glossy spider example also carries a retailer sticker. That does not make packaging rules simple, but it does give the article more than one isolated full-set anecdote.


<span id="special-branches"></span>
<span id="special-branches"></span>
== Special branches ==
== Special branches ==


[[File:Ref 16750 black-service.webp|thumb|right|280px|Black-bezel service 16750]]
[[File:Ref 16750 black-service.webp|thumb|right|280px|alt=Black-bezel service 16750|Black-bezel service 16750]]
<span id="matte-pepsi"></span>
=== Matte Pepsi ===


The matte Pepsi side is the branch that keeps the strongest visual link to the 1675 and is usually what collectors mean when they call the 16750 a true transitional watch.
<span id="omani-police-khanjar"></span>
=== Omani Police (Khanjar) ===
 
[[File:Ref 16750 government-oman-police.webp|thumb|right|220px|alt=16750 with Royal Oman Police emblem dial|16750 with Royal Oman Police emblem at 6 o'clock — one of four documented examples in the same 7.6M serial batch]]
 
A small Sultanate-of-Oman commission carries the Khanjar emblem at six o'clock above the depth wording. The variant is one of the rarest 16750 sub-types in the auction record. A Bonhams 2021 New Bond Street lot (Bonhams 26687/68, c.1983) carried estimate GBP 70,000–100,000; the catalog noted that a comparable example sold the prior year had a serial number 53 positions away, supporting concurrent-issue production for a single Sultanate commission. Phillips Hong Kong XI 2020 lot 1009 added a parallel anchor: four 16750 examples are known carrying the Royal Oman Police emblem in white print, all sharing 7.6 million serials and missing the inside-caseback serial repeat — consistent with concurrent batch production for a single commission. Khanjar 16750s sit in their own collector tier above the standard market.


<span id="black-bezel-service-example"></span>
<span id="black-bezel-service-example"></span>
=== Black-bezel service example ===
=== Service-replacement examples ===


The black 16750 in the package matters because it is not a perfect collector watch. It is more useful as a realism check than a trophy piece: black bezel, service dial, service date wheel, and a later bracelet all in one watch.
Service-replacement dials surface frequently. A "Swiss-only" service dial — replacing the original "T SWISS T" tritium wording with a later Luminova-or-tritium dial bearing only "Swiss" at the bottom — is the most common pattern. Service-era movement swaps from caliber 3075 to caliber 3175 also circulate. A 16750 case-back with the reference and case number is original; mid-case serials and movement numbers far apart in production date suggest one or both have been replaced. A documented Bonhams Hong Kong 2019 lot (case R672618, movement number 1,828,172) sits well outside the period 0,3xx,xxx-range 3075 movement numbers and reads as a service-replaced example.


<span id="glossy-spider-no-date-dial"></span>
<span id="glossy-spider-no-date"></span>
=== Glossy spider no-Date dial ===
=== Glossy spider with no-Date wording ===


This is the branch that gives the later 16750 its own collector identity rather than leaving it as a 1675 successor. The combination of white-gold surrounds, omitted Date wording, and web-like lacquer cracking is the strongest surviving-watch signal of an original late-run dial. A redial or service dial rarely carries any of those traits in isolation, and almost never all three at once.
The combination of glossy white-gold-surround indices, omitted "Date" wording, and web-like lacquer cracking on the same dial is the strongest single signal of an original late-run 16750 dial. Refinishes and service dials rarely carry any of those three traits in isolation, and almost never all three at once.


<span id="historical-market-and-auction-record"></span>
<span id="historical-market-and-auction-record"></span>
== Historical market and auction record ==
== Historical market and auction record ==


The market layer is still thin compared with the 1675, but it is already enough to show the reference's internal hierarchy. A matte Pepsi example anchors the transitional side, a black-bezel service example anchors the cautionary side, and a glossy spider example anchors the later collector side.
{| class="wikitable sortable"
|-
! Sale !! Lot !! Year !! Serial / config !! Hammer
|-
| Bonhams Knightsbridge || 29153/95 || 2024 || full set with dated 27 April 1981 receipt, spare Pepsi insert, brochures || GBP 10,240 incl. premium
|-
| Sotheby's Watches Online || 95 || 2020 || c.1982 matte Pepsi, movement 0,381,752 || est. CHF 9,000–12,000
|-
| Sotheby's Watches Online || 96 || 2020 || c.1984 glossy Pepsi with spider crazing || est. CHF 12,000–18,000
|-
| Sotheby's Watches || 109 || 2020 || c.1980 matte Pepsi, full set || est. USD 10,000–15,000
|-
| Sotheby's Fine Watches || 160 || 2022 || c.1984 glossy Pepsi spider, COSC hang tag || est. EUR 8,000–12,000
|-
| Sotheby's Important Watches || 125 || 2022 || c.1984 Pepsi || est. USD 10,000–20,000
|-
| Antiquorum Hong Kong || 373-296 || 2024 || c.1982 signature dial || HKD 68,750 (vs est. HKD 35,000–60,000)
|-
| Bonhams Hong Kong Watches 3.0 || 25282/845 || 2019 || case R672618, mvt 1,828,172 — service-replacement movement || HKD 100,625 incl. premium
|-
| Bonhams Fine Watches London || 26687/68 || 2021 || c.1983 Omani Police Khanjar, 27-jewel cal. 3075, Jubilee || est. GBP 70,000–100,000
|}


This is a useful first pass, though still dealer-led rather than auction-led. A direct auction-house 16750 lot would improve the market section immediately.
The 16750 trades as a usable late-vintage GMT-Master rather than an auction trophy. Standard examples cluster GBP 8,000–15,000 / CHF 9,000–18,000 across the major houses depending on dial generation, lume status, and paperwork. Matte Pepsi examples in clean original condition carry the transitional-watch premium. Glossy spider dials with intact dial-side originality sit at the top of the standard market — original spider crazing reads as a positive collector signal because affected dials were so often replaced under service. The Omani Police Khanjar variant sits in its own tier above all of the above.


== Sources ==
== Sources ==
* The Vintage Rolex Field Manual, Chevalier Edition — unknown, Morning Tundra
 
* [https://monochrome-watches.com/history-rolex-gmt-master-and-gmt-master-ii-1955-2024-iconic-traveller-watch-in-depth-review/ In-Depth: The History of the Rolex GMT-Master and GMT-Master II] — unknown, Monochrome
* [https://monochrome-watches.com/history-rolex-gmt-master-and-gmt-master-ii-1955-2024-iconic-traveller-watch-in-depth-review/ In-Depth: The History of the Rolex GMT-Master and GMT-Master II] (Monochrome)
* [https://www.sothebys.com/en/articles/the-rolex-gmt-master-the-complete-collectors-guide The Rolex GMT-Master: A Complete Collector's Guide] — Stephen Pulvirent, Sotheby's
* [https://www.sothebys.com/en/articles/the-rolex-gmt-master-the-complete-collectors-guide The Rolex GMT-Master: A Complete Collector's Guide] (Sotheby's)
* [https://www.bobswatches.com/vintage-rolex-gmt-master-16750-pepsi.html Vintage Rolex GMT-Master 16750 Pepsi] — unknown, Bob's Watches
* [https://www.41watch.com/en/journal/historical-reviews-of-iconic-watches/history-of-the-legendary-rolex-gmt-master History of the Legendary Rolex GMT-Master] (41Watch)
* [https://www.bobswatches.com/rolex-gmt-master-16750-black.html Rolex GMT-Master 16750 Black] — unknown, Bob's Watches
* [https://millenarywatches.com/rolex-gmt-16750/ Rolex GMT-Master 16750 Complete Guide] (Millenary Watches)
* [https://www.bobswatches.com/vintage-rolex-gmt-master-ref-16750-black-spider-dial.html Vintage Rolex GMT-Master Ref 16750 Black Spider Dial] — unknown, Bob's Watches
* [https://hairspring.com/finds/spider-dial-16750-rolex-gmt-master/ Spider Dial 16750 Rolex GMT-Master] (Hairspring)
* WatchProSite 16750 thread bundle — WatchProSite community, WatchProSite
* [https://beckertime.com/blog/rolex-caliber-3075/ The Rolex Caliber 3075] (Beckertime)
* [https://reference.grail-watch.com/movement/rolex-3075/ Rolex 3075 movement reference] (Grail Watch)
* [https://www.windvintage.com/rolex-gmtmaster-reference-16750-2 Rolex GMT-Master Reference 16750 Transitional Matte Dial] (Wind Vintage)
* [https://www.bonhams.com/auction/29153/lot/95/ Rolex GMT-Master Ref. 16750 with original 27 April 1981 receipt — Bonhams Knightsbridge lot 95] (Bonhams, 2024)
* [https://www.sothebys.com/en/buy/auction/2020/watches-online-2/rolex-pepsi-gmt-master-ref-16750-stainless-steel-2 Pepsi GMT-Master Ref 16750 c.1982 matte — Sotheby's Watches Online lot 95] (Sotheby's, 2020)
* [https://www.sothebys.com/en/buy/auction/2020/watches-online-2/rolex-pepsi-gmt-master-ref-16750-stainless-steel Pepsi GMT-Master Ref 16750 c.1984 glossy spider — Sotheby's Watches Online lot 96] (Sotheby's, 2020)
* [https://www.sothebys.com/en/buy/auction/2020/watches-5/rolex-reference-16750-gmt-master-pepsi-a-stainless Reference 16750 GMT-Master Pepsi c.1980 — Sotheby's Watches lot 109] (Sotheby's, 2020)
* [https://www.sothebys.com/en/buy/auction/2022/fine-watches-3/pepsi-spider-dial-gmt-master-reference-16750 Pepsi Spider Dial GMT-Master Reference 16750 c.1984 — Sotheby's Fine Watches lot 160] (Sotheby's, 2022)
* [https://www.sothebys.com/en/buy/auction/2022/important-watches-3/reference-16750-gmt-master-pepsi-a-stainless-steel Reference 16750 GMT-Master Pepsi c.1984 — Sotheby's Important Watches lot 125] (Sotheby's, 2022)
* [https://catalog.antiquorum.swiss/en/lots/rolex-ref-16750-gmt-master-lot-373-296 Rolex Ref. 16750 GMT-Master c.1982 — Antiquorum HK lot 373-296] (Antiquorum, 2024)
* [https://www.bonhams.com/auction/25282/lot/845/ Rolex GMT-Master 16750 — Bonhams HK Watches 3.0 lot 845] (Bonhams, 2019)
* [https://www.bonhams.com/auctions/26687/lot/68/ Rolex GMT-Master Ref 16750 'Omani Police' c.1983 — Bonhams Fine Watches London lot 68] (Bonhams, 2021)
* [https://watch-collector.co.uk/rolex-bracelet-end-link-codes/ Rolex Bracelet End Link Codes reference]
* ''The Vintage Rolex Field Manual'' — Colin A. White, Morning Tundra


[[Category:GMT-Master]]
[[Category:GMT-Master]]
[[Category:Working Draft]]
[[Category:Working Draft]]

Latest revision as of 04:21, 30 April 2026


GMT-Master -> 16750

The 16750 is the first five-digit GMT-Master and the bridge between the 1675 and the 16760 / 16710 generation. Caliber 3075 raised the beat rate from 19,800 to 28,800 vph and added quick-set date, but the older caller-GMT mechanic stayed: the 24-hour hand tracks the local hour hand, the second time zone reads off the rotating bezel. The acrylic crystal stayed too. The result is a watch that lives mechanically halfway between the 1675 it replaced and the sapphire-era GMTs that followed.

Acrylic, linked-hand GMT
Acrylic, linked-hand GMT

Core facts

detail value
reference 16750
family GMT-Master
production 1981 to 1988 (dominant editorial reading); 1979/1980 launch surfaces in some specialist sources. Earliest primary anchor in major-house lots is a documented 27 April 1981 retailer receipt
total examples no published Rolex production figure. Run length is eight years against the 1675's twenty-one — the 16750 is meaningfully scarcer
case 40mm Oyster with crown guards
crystal acrylic with Cyclops
water resistance 100m
movement caliber 3075 — 27 jewels, 28,800 vph, 48-hour reserve. Free-sprung Microstella balance with Breguet overcoil, hacking seconds, quickset date. 28.5 × 6.2mm. Hand-stack order changed from the 1575GMT to hour / GMT / minute / second
GMT mechanic caller GMT — 24-hour hand stays linked to the local hour hand, second zone reads off the bezel
dial generations matte (early, ~1981–1985) → glossy lacquer with applied white-gold-circled tritium indices (~1986 onward); the transition is overlapping rather than a hard cutover, with 1984 examples documented in both finishes
bezel bidirectional 24-hour aluminium insert in Pepsi or all-black. Coke is a 16760 trait, not a 16750 option
bracelet 78360 Oyster with 580 endlinks period-correct; Jubilee 62510H with 501 endlinks optional
successor 16700 caller GMT (1988–1999) and the 16760 flyer GMT-Master II (1983–1988) running concurrently after 1983

Where it sits in the line

The 16750 follows the long 1675 run and is the first GMT-Master with a five-digit reference number. It runs for eight years and ends in 1988, the same year the 16760 retires. The 16760 brings the independent local hour hand and the flyer-GMT mechanic; the 16750 keeps the older linked-hand caller mechanic that defines the original GMT-Master line. The 16700 takes the caller mechanic forward into 1999 with the sapphire crystal and the slightly different caliber 3175.

The 16750 is more modern than a 1675 — quickset date, higher beat rate, hacking — but mechanically it still behaves like a GMT-Master rather than a GMT-Master II. The acrylic crystal and the 40mm crown-guard case look modern next to the 1675 but read as vintage next to the sapphire-and-flyer 16710 that follows the 16760.

Production outline

Production ran approximately 1981 to 1988 across the dominant editorial reading. A specialist split surfaces on the launch year — some specialist sources push it back to 1979 or 1980. The earliest primary-document anchor is a 27 April 1981 retailer receipt accompanying a documented full-set Bonhams lot in 2024. Catalogued examples dated 1980 surface in the auction record (Sotheby's 2020 lot 109), so the 1980 reading is not unsupported, but the bulk of surviving examples date 1981 onward.

No published Rolex production figure surfaces in the surveyed sources. The eight-year run versus the 1675's twenty-one years implies meaningfully smaller volume — collectors describe the 16750 as "particularly scarce" against the 1675, with matte-dial examples covering only roughly the first four to five years of the run.

Movement notes

Caliber 3075 in 16750
Caliber 3075 in 16750

Caliber 3075 is the headline upgrade over the 1575GMT it replaces. Specifications: 27 jewels, 28,800 vph (up from 19,800 vph), 48-hour power reserve, hacking seconds, quickset date through the crown. Free-sprung Microstella balance with Breguet overcoil. 28.5mm diameter, 6.2mm thick. Some specialist movement registries quote ~50-hour reserve; the 48-hour figure is the more conservative reading.

The hand-setting stack also changed from the 1575GMT — on the 3075 the order reads hour, GMT, minute, second from the centre post outward. Despite the higher beat rate and the quickset date, the 3075 retains the linked-hand caller-GMT mechanic. The 24-hour hand cannot be set independent of the local hour hand on the 16750. That step waited for the 3085 in the 16760 (1983) and the 3185 in the 16710 (1989).

The 3075 is succeeded directly by the 3175 in the 16700 (1988–1999) — a one-reference caliber that retains the caller mechanic with minor revisions. Service-era movement swaps from 3075 to 3175 do circulate; the calibers do not behave identically across hand-setting and date-setting directions, and a 3175 in a 16750 case is a service replacement rather than original fitment.

Dial map

Two dial generations cleanly mapped. The transition is overlapping rather than a hard cutover — 1984 examples surface in both matte and glossy finishes, so the year is the overlap zone rather than a clean hand-off.

Matte (early, ~1981–1985)

Matte-dial Pepsi 16750
Matte-dial Pepsi 16750

Matte black ground with painted indices, no white-gold surrounds. Closest visual link to the late-1675 dial. Tritium luminous compound across the run. The matte 16750 is the watch most likely to be misidentified at a glance as a late 1675; the caliber 3075's hand-stack order and the case-back interior reference number are the cleanest tells.

Glossy white-gold-surround (~1986 onward)

Glossy black lacquer with applied indices in white-gold surrounds. The surface treatment marks the modernization of the dial face — the same WG-surround applied-index format that runs forward into the 16760 and 16710. Tritium continues across this generation; the lume colour is consistent with the matte production and the same period mid-1980s tritium ageing pattern.

Spider crazing

Glossy spider dial 16750
Glossy spider dial 16750

Not a separate factory variant. Hairline cracks form in the glossy lacquer over time — a manufacturing defect of the lacquer formulation Rolex used for the white-gold-surround dials before later reformulations. Affected dials were often replaced under service, so survivors with intact spider crazing carry a collector premium for original-dial integrity. The collector view of the pattern splits — some read it as patina, some as damage.

No-Date wording variant

A small group of early glossy dials omit the word "Date" above "GMT-Master" at six o'clock. The variant belongs inside the early glossy branch rather than as a separate dial era. The omitted-Date layout is a documented sub-variant rather than a misprint.

Case, bezel, crystal, and crown

The case is the standard 40mm Oyster with crown guards. The acrylic crystal — with the magnifying Cyclops over the date — is the cleanest single-glance separator from the sapphire-era GMTs that follow. The 100m water-resistance rating carries the 1675 specification forward unchanged.

The bezel is a bidirectional 24-hour aluminium insert. Pepsi and all-black are the only factory configurations on the steel 16750 — Coke (red and black) is a 16760 trait and not a documented 16750 option. Insert-back colour is not a clean dating tell on its own; early matte watches sometimes carry red-back inserts, later examples more often blue-back or service-era replacements.

Bracelets, end links, clasps, and packaging notes

Period-correct delivery is the 78360 Oyster with 580 endlinks. Jubilee 62510H with 501 endlinks is the optional configuration. Earlier 580 endlinks are shared across the Submariner 5512 / 5513 / 1680 / 16800, Explorer 1016, and GMT-Master 1675 / 16750. Bracelet originality on a 16750 needs case-and-clasp-date verification rather than relying on the endlink stamp alone.

Surviving examples wear both options. Matte Pepsi watches turn up on Jubilee more often than the glossy / black-bezel side; black and glossy-spider examples lean Oyster. Fitment as found at auction is not a reliable proxy for original delivery — the 1980s service window covers most surviving 16750s and bracelet swaps were common.

Special branches

Black-bezel service 16750
Black-bezel service 16750

Omani Police (Khanjar)

16750 with Royal Oman Police emblem dial
16750 with Royal Oman Police emblem at 6 o'clock — one of four documented examples in the same 7.6M serial batch

A small Sultanate-of-Oman commission carries the Khanjar emblem at six o'clock above the depth wording. The variant is one of the rarest 16750 sub-types in the auction record. A Bonhams 2021 New Bond Street lot (Bonhams 26687/68, c.1983) carried estimate GBP 70,000–100,000; the catalog noted that a comparable example sold the prior year had a serial number 53 positions away, supporting concurrent-issue production for a single Sultanate commission. Phillips Hong Kong XI 2020 lot 1009 added a parallel anchor: four 16750 examples are known carrying the Royal Oman Police emblem in white print, all sharing 7.6 million serials and missing the inside-caseback serial repeat — consistent with concurrent batch production for a single commission. Khanjar 16750s sit in their own collector tier above the standard market.

Service-replacement examples

Service-replacement dials surface frequently. A "Swiss-only" service dial — replacing the original "T SWISS T" tritium wording with a later Luminova-or-tritium dial bearing only "Swiss" at the bottom — is the most common pattern. Service-era movement swaps from caliber 3075 to caliber 3175 also circulate. A 16750 case-back with the reference and case number is original; mid-case serials and movement numbers far apart in production date suggest one or both have been replaced. A documented Bonhams Hong Kong 2019 lot (case R672618, movement number 1,828,172) sits well outside the period 0,3xx,xxx-range 3075 movement numbers and reads as a service-replaced example.

Glossy spider with no-Date wording

The combination of glossy white-gold-surround indices, omitted "Date" wording, and web-like lacquer cracking on the same dial is the strongest single signal of an original late-run 16750 dial. Refinishes and service dials rarely carry any of those three traits in isolation, and almost never all three at once.

Historical market and auction record

Sale Lot Year Serial / config Hammer
Bonhams Knightsbridge 29153/95 2024 full set with dated 27 April 1981 receipt, spare Pepsi insert, brochures GBP 10,240 incl. premium
Sotheby's Watches Online 95 2020 c.1982 matte Pepsi, movement 0,381,752 est. CHF 9,000–12,000
Sotheby's Watches Online 96 2020 c.1984 glossy Pepsi with spider crazing est. CHF 12,000–18,000
Sotheby's Watches 109 2020 c.1980 matte Pepsi, full set est. USD 10,000–15,000
Sotheby's Fine Watches 160 2022 c.1984 glossy Pepsi spider, COSC hang tag est. EUR 8,000–12,000
Sotheby's Important Watches 125 2022 c.1984 Pepsi est. USD 10,000–20,000
Antiquorum Hong Kong 373-296 2024 c.1982 signature dial HKD 68,750 (vs est. HKD 35,000–60,000)
Bonhams Hong Kong Watches 3.0 25282/845 2019 case R672618, mvt 1,828,172 — service-replacement movement HKD 100,625 incl. premium
Bonhams Fine Watches London 26687/68 2021 c.1983 Omani Police Khanjar, 27-jewel cal. 3075, Jubilee est. GBP 70,000–100,000

The 16750 trades as a usable late-vintage GMT-Master rather than an auction trophy. Standard examples cluster GBP 8,000–15,000 / CHF 9,000–18,000 across the major houses depending on dial generation, lume status, and paperwork. Matte Pepsi examples in clean original condition carry the transitional-watch premium. Glossy spider dials with intact dial-side originality sit at the top of the standard market — original spider crazing reads as a positive collector signal because affected dials were so often replaced under service. The Omani Police Khanjar variant sits in its own tier above all of the above.

Sources

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