Classic Dual Time The GMT-Master has long been a trusted companion for travellers, combining technical mastery with enduring design. This 40mm model in Oystersteel and yellow gold reflects that tradition, offering clarity and precision across time zones. Its black dial and rotatable bezel underscore its distinctive character. Reliable Craftsmanship Powered by the calibre 3185 with a 48-hour power reserve, this reference features an Oyster bracelet with Oysterlock clasp for security. The sapphire crystal ensures clarity and resilience.