Across Time Zones Originally developed for airline pilots in the 1950s, the Rolex GMT-Master II allows the wearer to track multiple time zones simultaneously. Its robust design and distinctive bezel have made it a favourite among travellers and collectors alike. Classic Utility This 2005 reference 16710LN features a 40mm Oystersteel case with a black 24-hour rotatable bezel and matching black dial. The Oyster bracelet with Oysterlock clasp ensures secure wear, while the calibre 3185 automatic movement delivers a 48-hour power reserve. A versatile tool watch with enduring appeal.