Travel Icon The GMT-Master II is a trusted companion for global travellers. Originally developed for airline pilots, it allows wearers to track multiple time zones with ease, combining robust functionality with unmistakable design. Classic Aesthetics This reference 16710BLRO features a 40mm Oystersteel case, black dial, and a rotatable 24-hour bezel in red and blue. Powered by the calibre 3185 automatic movement, it offers a 48-hour power reserve and independent hour hand adjustment. The Oyster bracelet is secured with an Oysterlock clasp, delivering classic GMT functionality in a bold, heritage-inspired design from 2003.