Description 1999 Case: stainless steel, bidirectional rotating blue-red bezel, 40 mm diameter Bracelet: stainless steel Oyster Dial: black with sapphire glass and date loop Functions: date Reference number: 16710 Serial number: U 890078 Movement number: 38120185 Caliber: 3185, automatic Accessories: presentation box, outer packaging, extra black ceramic bezel, sales tags and papers Gross weight approx. 125 g Provenance: - Juwelier Eugene van Baal, Nijmegen - Private collection, the Netherlands Note: The Rolex GMT-Master wristwatch was originally designed in collaboration with Pan American Airways and issued by the airline to their crews on long-haul flights. ‘GMT’ in the name stands for Greenwich Mean Time also 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. In the early 1980s the Rolex GMT-Master II was released - the production of the original