The first Rolex Oyster Perpetual GMT-Master Replica watch was specially designed for the pilots in international lines flights by the joint research of Rolex and Pan Am in 1955. While now High Quality Rolex GMT Master II Replica Watches are equipped with 24 hours rotating the outer ring bezel which provides a easy reading for three time zones, including the time of two time zones simultaneously reading, and the other for the traveler. This small feature is very practical.
Although the GMT-Master II Replica Watches were designed essentially for professional use, it combines of peerless functionality and rugged good looks which attract a wider travelling public. The model case is made of 40mm oyster steel with the screw-down case back and winding crown. The whole bracelet is made of 904 steel which is mainly used in the high technology, aerospace and chemical industries, where maximum resistance to corrosion is essential.
And the bezel is Bidirectional rotatable 24-hour graduated with two-color blue and black Cerachrom insert in ceramic, engraved numerals and graduations. And they use calibre 3186, a self-winding mechanical movement entirely developed and manufactured by Rolex. Like all Rolex Perpetual movements, the 3186 is a certified Swiss chronometer, a designation reserved for high-precision watches that have successfully passed the Swiss Official Chronometer Testing Institute (COSC) tests.