Dual-Time Legacy The Rolex GMT-Master was originally developed in collaboration with Pan Am pilots in the 1950s, offering the ability to track multiple time zones simultaneously. Its rotating bezel and 24-hour hand made it an essential tool for international travel, and it has since become a hallmark of Rolexs professional watchmaking heritage. Travel Companion This reference 16700, from 1997, features a 40mm Oystersteel case and is powered by the calibre 3175 automatic movement with a 48-hour power reserve. The black dial is framed by a rotatable 24-hour bezel, while the Jubilee bracelet and Oysterclasp ensure comfort and security. A classic example of Rolexs aviation-inspired design, this model is offered through the Rolex Certified Pre-Owned programme with official documentation and a two-year international guarantee.