Reference:gmt-master
The first watch Rolex ever built for airline pilots, and one of its most copied designs since. Launched in 1955 for Pan Am flight crews, the GMT-Master carries a fourth hand and a 24-hour bezel so the wearer can track two time zones at once. Bakelite turned to aluminum, steel split from gold and two-tone, and the GMT-Master became the GMT-Master II when the local hour hand learned to move on its own. Color branches — Pepsi, Root Beer, Coke, black — ended up carrying as much collector weight as the reference numbers themselves.
Early GMT-Master (1955–1959)
The experimental years. No crown guards, a bakelite 24-hour bezel that cracked easily, and an alpha-handed gold branch alongside the red-and-blue steel watch. Most surviving examples carry later service inserts because the original bakelite was fragile enough to rarely survive daily wear.
| Reference | Production | Movement | Case | Bezel | Key distinction |
|---|---|---|---|---|---|
| 6542 | 1955–1959 | 1036 / 1065 / 1066 | 38mm SS or 18k YG | Bakelite Pepsi (steel), bakelite brown (gold) | First GMT-Master; no crown guards; fragile bakelite insert |
Long vintage core (1959–1980)
The reference that turned the GMT-Master from an experiment into an institution. Crown guards arrived with the 1675, along with an aluminum insert and a 20-year production run long enough to hold several distinct watches under one number. Early pointed crown guards give way to rounded guards, gilt dials give way to matte, and a gold branch and two-tone Root Beer branch develop alongside the steel watch.
| Reference | Production | Movement | Case | Branches | Key distinction |
|---|---|---|---|---|---|
| 1675 | 1959–1979 | 1565 early, 1575 later | 40mm SS, 18k YG, or two-tone | Steel, 1675/8 gold, 1675/3 Root Beer | Core vintage GMT-Master; PCG to rounded guards, gilt to matte |
Transitional GMT-Master (1979–1988)
The five-digit quick-set era on the GMT-Master side of the family split. Caliber 3075 adds quick-set date and a higher beat rate, but keeps the older linked-hand GMT logic. Acrylic crystal holds through most of the run. This is also where the line’s branch map gets busier, with steel, two-tone, and solid-gold references all in production at once.
| Reference | Production | Movement | Case | Branches | Key distinction |
|---|---|---|---|---|---|
| 16750 | 1979–1988 | 3075 | 40mm SS | Matte to glossy Pepsi, black, spider | Last steel GMT-Master with acrylic crystal; quick-set date |
| 16753 | 1979–1988 | 3075 | 40mm SS + 18k YG | Brown Root Beer, black | Two-tone continuation of the Root Beer line |
| 16758 | 1979–1988 | 3075 | 40mm 18k YG | Brown Root Beer, black | Last gold GMT-Master with older linked-hand logic |
GMT-Master II (1982–2007)
The functional break in the family. Caliber 3085 in the 16760 introduced an independently adjustable local hour hand, which turned the 24-hour bezel into a third-time-zone tool rather than just a second-time-zone aid. The thick transitional 16760 gave way to the slimmer 16710 in 1989, and the line spent nearly two decades there before the ceramic era rewrote the watch.
| Reference | Production | Movement | Case | Branches | Key distinction |
|---|---|---|---|---|---|
| 16760 | 1983–1987 | 3085 | 40mm SS (thick) | Coke, black | First GMT-Master II; “Fat Lady” / “Sophia Loren” |
| 16710 | 1989–2007 | 3185, late 3186 | 40mm SS | Pepsi, Coke, black | Long neo-vintage steel run; late stick-dial 3186 sub-branch |
| 16713 | 1989–2007 | 3185, late 3186 | 40mm SS + 18k YG | Brown, black | Two-tone GMT-Master II branch |
| 16718 | 1989–2007 | 3185, late 3186 | 40mm 18k YG | Black well-documented, brown thinner | Solid-gold GMT-Master II branch |
Late GMT-Master (1988–1999)
The last reference on the original side of the family split. Sapphire crystal, caliber 3175, and a choice of Pepsi or black bezel — but crucially, still the older linked-hand GMT logic rather than the independent flying hour hand of the GMT-Master II references it runs in parallel with.
| Reference | Production | Movement | Case | Branches | Key distinction |
|---|---|---|---|---|---|
| 16700 | 1988–1998/1999 | 3175 | 40mm SS | Pepsi, black | Last GMT-Master; tritium to Luminova transition |
Movement progression
| Caliber | Frequency | Hacking / quick-set | Used in | Notes |
|---|---|---|---|---|
| 1036 / 1065 / 1066 | 18,000 vph | no / no | 6542 | Earliest GMT-specific movements; picture still unresolved |
| 1565 | 18,000 vph | no / no | 1675 (early) | First stable 1675 caliber |
| 1575 | 19,800 vph | hacking from ~1971 | 1675 (late) | Long-run 1675 caliber; sometimes signed 1570 |
| 3075 | 28,800 vph | yes / yes | 16750, 16753, 16758 | Five-digit quick-set upgrade; still linked-hand GMT |
| 3085 | 28,800 vph | yes / yes | 16760 | First independently adjustable local hour hand |
| 3175 | 28,800 vph | yes / yes | 16700 | Last linked-hand GMT-Master caliber |
| 3185 | 28,800 vph | yes / yes | 16710, 16713, 16718 | Long neo-vintage GMT-Master II movement |
| 3186 | 28,800 vph | yes / yes | late 16710, 16713, 16718 | Rare late Parachrom-era movement |
Color and metal logic
Recurring branch identities run across the reference numbers and sometimes matter more than the digits themselves.
- Pepsi starts with the steel 6542 and remains the default visual identity of the line
- Root Beer begins with the two-tone and gold branch around 1675/3 and 1675/8, then carries forward into 16753, 16758, 16713, and the brown side of 16718
- Coke arrives with the first GMT-Master II and stays associated mainly with the 16760 and early 16710
- gold and two-tone GMT-Masters are part of the family from the earliest production onward, not a late luxury afterthought
Collecting context
The GMT-Master market rewards different habits than the Submariner market, even when the watches overlap in period. The Submariner collects around case shape, military use, and dial text. The GMT-Master collects just as much around bezel color, travel mythology, and branch identity.
The same caution comes up again and again across the family.
- original delivery is not the same thing as period-correct fitment
- bracelet dates do not date the watch head
- service inserts are common, especially on the earliest references
- nickname language is useful, but it can flatten real differences between black, brown, Pepsi, and Coke branches if you let it
Modern ceramic references (116710, 126710, 116718, 126715) are not in this first upload tranche yet. This hub is built around the vintage and neo-vintage references already in the research layer.
Sources
- In-Depth: The History of the Rolex GMT-Master and GMT-Master II — unknown, Monochrome
- The Rolex GMT-Master: A Complete Collector's Guide — Stephen Pulvirent, Sotheby's
- A Closer Look at the Rolex Root Beer — Christina Bohn, Sotheby's
- The Vintage Rolex Field Manual, Chevalier Edition — unknown, Morning Tundra