1978 Rolex GMT-Master (Ref. 1675) Mk. V

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The Rolex GMT is the jet-setting icon of the Rolex sports watch family. The history of this sophisticated, versatile style dates back to 1954 when Rolex received a request from Pan Am to create a technical pilots watch that could indicate two time zones simultaneously.   As advances in aviation made transcontinental flights commercially available Pan Am needed a watch that could be issued to their crews on long-haul international flights.

GMT stands for Greenwich Mean Time - the time zone that regulates world clocks and is required for all aviation planning and schedules. The Rolex GMT Master has a fourth 24-hour hand that directly displays the same time zone as the standard 12-hour hand but on a 24-hour scale. The addition of this GMT hand enabled crews to set the watch to GMT or another time zone, and, using the rotating 24-hour scale bezel, correct the offset to display a second-time zone on the 24-hour scale.

This feature is just as useful today, allowing the modern traveler to easily keep track of his home time zone, no matter how far he may have journeyed.

Stock # RLXGMT781675-3
Brand Rolex
Style GMT-Master
Model 1675
Serial 58XXXXX
Size Men's
Material Stainless Steel
Dial Matte Black Mk. 5
Millimeters 40

Rolex 78360 Oyster Bracelet W/ 580 End Pieces



The excellent case has been previously lightly polished retaining thick and even lugs with strong crown guards. The black "fat font" bezel insert has taken on a wonderful light grey fade showing little signs of use. The Rolex 78360 bracelet with 580 end pieces is in wonderful condition showing minimal stretch from use.


The matte black Mk. 5 GMT-Master dial is in beautiful condition. The tritium lume plots have achieved an excellent creamy yellow coloration and exhibit no degradation under U.V. light inspection. The original hands have been professionally restored with tritium to match the dial. The white date wheel displays open 6's and 9's and is an early service replacement.


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