1978 Rolex GMT Master (Ref. 1675) Mk. IV

The Rolex GMT is the jet-setting icon of the Rolex sports watch family. Like the Rolex Submariner, the Rolex GMT is sophisticated, rugged, and versatile.

In 1954 Pan Am started using the newly designed Boeing 707 which allowed for Pan Am to fly transcontinentally and is said to have started the commercially available jet age. In the same year, Rolex received a request from Pan Am to create a technical pilots watch which indicated two time zones simultaneously that could be issued by the airline to their crews on long-haul transcontinental international flights.

Rolex GMT Pan Am 1675

GMT or UTC stands for Greenwich Mean Time or Coordinated Universal Time which is the primary time standard by which the world regulates clocks and time. GMT or UTC is the time zone that is required for all aviation planning, weather forecasts, schedules and other paperwork.

The original Rolex GMT Master has a fourth 24-hour hand directly displaying the same time zone as the standard 12-hour hand but on a 24-hour scale. This GMT hand enabled the crews to set the watch to GMT or another time zone, and, using the rotatable 24-hour scale bezel, set to the correct offset thus displaying a second-time-zone on the 24-hour scale.

This specific piece would make a great daily driver for the man always on the go and would make a great addition to an existing collection as Ref. 1675 GMT's are becoming harder to find due to the fact they are becoming highly collectible and sought after among collectors.


Stock #
Brand Rolex
Style GMT Master
Model 1675
Serial 53XXXXX
Size Men's
Material Stainless Steel
Dial Matte Black (Mk.4)
Millimeters 40
Strap NATO Stap "O.D. Green"



The unpolished case retains factory chamfer and shows little wear from use. The original black "fat font" insert has faded to an excellent gray/blue coloration. The watch will come supplied on a NATO strap "O.D. Green"


The wonderful Mk. IV dial remains in wonderful vintage condition. The tritium lume plots remain in wonderful condition and show no degradation. The tritium hands match the dial and also remail fully intact showing no tritium lume degradation.


None. The watch was recently serviced and is running at COSC spec backed by a 1-year warranty.