The GMT Master was designed by Rolex in collaboration with PAN-AM Airlines and issued by the airline to their crews on long-haul flights. ("GMT" in the name stands for Greenwich Mean Time now known as Coordinated Universal Time).The original GMT Master watch has a 24-hour display fourth hand complication directly linked to and displaying the same time zone as the standard 12-hour hand. 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 a second time zone could be read. 

Other than the classic version of the GMT gold with the black bezel and dial, a limited edition was made fitted with a Bachelite amber bezel and a chocolate brown dial. This limited edition collection is commonly called 'Tiger Eye', as the dial colour is very reminiscent to it.

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