With Bureaux Suisse de Contrôle Officiel de la Marche des Chronomètres Watch Rate Certificate No. 530'032 dated 16 May 1969, Rolex Service Instruction booklet numbered 1675 and 1951939, One Year Factory Service Guarantee dated 5 August 1976, repair invoice, GMT-Master brochure and original fitted green presentation box.
The present watch is a lovely example of a 1960s GMT Master still featuring the popular black lacquered dial with the gilt printing instead of the later black matte dial with white designations.
Due to the extraordinary success of the Rolex Sports models in the 1950s, it came to no surprise when the world's largest airline Pan Am commissioned a specially designed watch allowing their pilots to keep track of time in two locations.
With the beginning of transatlantic flights with jet aircrafts in 1956, travellers appreciated the fact that the journey times were reduced from 13 hours to 7 but suffered from new phenomena, the jet lag. Worried about the possible effects on their pilots and, after researches, Pan Am management advised them to keep on "home" time while away from base. As at the same time they needed to know the local time and consequently, a joint task force from Pan Am and Rolex was assigned. The team devised a watch with an additional hour hand, which revolved once every 24 hours and a rotating bezel marked with those same 24 hours. The model was named "G.M.T.-Master" after the world's standard time, the Greenwich Mean Time.