Rolex GMT Master II

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The "'Rolex GMT Master'" is a part of the professional collection of Rolex Oyster Perpetual watches. It was originally designed in 1956 to aid pilots who travelled through mulitple time zones. The original GMT was replaced, within the last ten years (see note below), with the GMT Master II model which features a sapphire crystal which cannot easily be scratched. Both the original GMT and the GMT II can display the time in 2 different time zones by having an additional "GMT" hand which completes a 24 hr cycle in a single rotation. Use of the bi-directional rotatable bezel allows for a third time zone to be displayed.

Initially released in 1956, the watch was designed in collaboration with Pan-Am Airlines for use by their pilots. Today, this watch is popular with travelers and people who need to keep track of the time across multiple time zones.

The 50th anniversary edition of the GMT Master II was revealed at Basel Fair 2006. This new model features a number of technical enhancements, such as Rolex's patented Parachrom hairspring as well as a larger Triplock crown. The new model also has several cosmetic improvements such as larger hands and a new bezel made of an extremely hard ceramic material which greatly resists damage and discoloration. The numbers on this bezel are filled with a fine layer of gold, using a process of physical vapor deposition.

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