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http://www.thewatchbox.com/watches/rolex/ The Rolex GMT-Master is the prince of pilot watches. And a stainless steel/ yellow gold GMT-Master 1675/3 is a "crown prince" among them. The GMT-Master may have gotten off the ground with Pan-Am, but this immaculate two-tone vintage GMT looks ready to soar with the Concorde. The classic GMT-Master is the father of all serious aviation watches. Upon its debut in 1955, it became the first watch to combine a bi-directional 24-hour bezel, automatic winding, and a fourth hand moving at half-speed (a "24-hour" hand). This combination granted pilots the unprecedented ability to view universal time (GMT) while retaining easy access to local times via the rotating bezel. This example of the second generation Rolex GMT-Master features a number of outstanding vintage highlights. With a serial number in the 5.2 million range, this watch can be dated to approximately late 1977 or early 1978. Its "big arrow" 24-hour hand and larger crown guards are characteristic of the GMT from the late 1960s onward, and both features present in outstanding condition. The highlight of this example is the “jet” black “nipple” dial and matching bezel. Both are radiant relics from a more romantic era of aviation when flight was glamorous and professional pilots inspired the public imagination. Exquisite yellow gold hands and "nipple" indexes were exclusive to the upscale gold and two-tone 1675/8 and 1675/3 references; steel models made do with printed dials and corrosion-prone hands. Inside the case, a Rolex caliber 1575 automatic movement provides COSC Swiss Chronometer-certified precision. Its fourth hand, which moves at the rate of one circuit per 24 hours, enables the user to keep track of GMT while checking local times using the bi-directional “pilot’s GMT” bezel. In 1965, Rolex upgraded the GMT-Master to the higher beat (19,800 VpH vs. 18,000) caliber 1575, and in 1971, the Geneva watchmaker added hacking (stop seconds) for precise synchronization to a reference time. This GMT-Master 1675/3 incorporates both refinements. Moreover, the caliber 1575 as featured in this GMT-Master exhibits the signature Rolex free-sprung escapement with Breguet hairspring for maximum resistance to shock, temperature fluctuation, and position-induced error. This Rolex GMT-Master 1675/3 in stainless steel and yellow gold is available in outstanding condition with extensive Rolex factory accessories on www.thewatchbox.com. Video and content by Tim Mosso.