3034. Rolex retailed by Tiffany & Co. A very fine and rare stainless steel automatic calendar and dual time zone bracelet watch Rolex retailed by Tiffany & Co. A very fine and rare stainless steel automatic calendar and dual time zone bracelet watch Model: GMT-Master 'Long E Reference: 1675 Date: Circa 1968 Movement: 26-jewel Cal.1570 automatic, adjusted to 5 positions and temperature, No.D752512 Dial: Black matte, dot hour markers, baton quarters, white outer minute divisions, magnified date aperture at 3, polished Mercedes hands with luminous inserts, centre seconds, arrow tipped red dual time zone hand Case: Brushed and polished tonneau form, screw down back and shouldered screw down crown, inside case back stamped IV.67, black bezel insert, No.1870686 Strap/Bracelet: Brushed 7836 Oyster folded link, end links stamped 358 Buckle/Clasp: Signed folding clasp Signed: Case, dial & movement Size: 39mm The Rolex GMT was launched in 1954 after the Transatlantic Airways company asked Rolex to produce a watch useful for their pilots. It quickly gained favour among the Pan-Am executives and the business jet-set community as a whole. Offered continuously since its introduction with relatively little modification it is perhaps, along with the Submariner, the most classic Rolex 'tool' watch made. The reference 1675 began production 80 years ago in 1960. This was the first GMT Master reference to feature protective crown guards as well as the smaller triangular tip on the second hour hand. The current example features a black insert and was retailed by Tiffany & Co.