Rolex. A stainless steel GMT Wristwatch
Model: GMT Master
Movement: Cal. 1575
Serial number:3.9 million
Case: 40mm; stainless steel with screw-down case back and crown; winding crown engraved with Rolex coronet logo; square crown guard; rotating blue and red "Pepsi" bezel; stainless steel Rolex Oyster bracelet. Turning light brown
Dial: Matte black dial; luminous baton and dot hour and minute markers, outer minute divisions; central red GMT hand with luminous arrow tip; luminous Mercedes hands; date window with magnified Rolex cyclops at 3 o'clock
Rolex introduced the GMT-Master in 1954 with the ref. 6542. It was developed for Pan-Am pilots, to display multiple timezones as the airline operated more transatlantic flights. The ref. 6542 ran for five years, when the ref. 1675 was introduced.
The ref. 1675, available in stainless steel or 18k gold (and a combination stainless steel and gold, called Rolesor), was the first GMT model to feature hacking-seconds, introduced in 1971. While earlier versions of the ref. 1675 had a smaller GMT hand, the hand became larger in the late 1970s. Rolex ceased production of the ref. 1675 in the 1980s, in favor of the current ref. 16750.
The present watch dates from the last decade of production of the ref. 1675, and features the iconic blue and red "Pepsi" bezel which has made the GMT-Master an immensely popular model of vintage Rolex.