Global Precision The GMT-Master was created for those who navigate the world, a watch that unites technical innovation with enduring style. This 40mm model in Oystersteel reflects that heritage, offering clarity and functionality across time zones. Its black dial and rotatable 24-hour bezel underscore its practical elegance. Travel Companion Powered by the calibre 3186 with a 48-hour power reserve, this reference features an Oyster bracelet with Easylink extension for comfort. The sapphire crystal and robust construction ensure reliability in every environment.