Global Functionality The GMT-Master II is designed for travellers, with a 24-hour hand and rotatable bezel that allow tracking of multiple time zones. It combines technical capability with enduring style. The Traveller's Companion This 2003 model features a 40mm Oystersteel case with a black dial and matching 24-hour bezel. Powered by the calibre 3185 automatic movement, it offers a 48-hour power reserve. The Oyster bracelet is secured with an Oysterlock clasp, ensuring a secure and comfortable fit.