Rolex GMT-Master II Oyster, 40 mm, Oystersteel

Case: Oyster, 40 mm, Oystersteel
Bezel: Bidirectional rotating 24-hour graduated bezel in blue and black Cerachrom
Dial: Black; Clear, legible Chromalight display with blue luminescence
Crown: Screw-down, Triplock triple waterproofness system
Crystal: Scratch-resistant sapphire, Cyclops lens with date display
Waterproof: Water-resistant to 100 meters / 330 feet
Movement: Perpetual, mechanical, self-winding, GMT function; Calibre 3285, Manufacture Rolex
Accuracy: -2/+2 seconds/day, after complete installation
Oscillator: Paramagnetic blue Parachrom hairspring. High-performance shock-resistant Paraflex technology
Winding: Bidirectional self-winding mechanism via Perpetual rotor
Power reserve: Approximately 70 hours
Bracelet: Jubilee, 5-piece link
Clasp: Oysterlock safety folding clasp with 5 mm Easylink extension link

24-Hour Rotatable Bezel

This model features a black dial and a two-colour Cerachrom bezel insert in blue and black ceramic. In addition to conventional hour, minute and seconds hands, the GMT-Master II features an arrow-tipped hand, which circles the dial once every 24 hours, as well as a bidirectional rotatable 24-hour graduated bezel. The distinctively coloured 24-hour hand displays the “home” reference time in a first time zone which can be read on the graduations on the bezel. The traveller’s local time is easily set by “jumping” from hour to hour, thanks to an ingenious mechanism operated via the winding crown: the hour hand can be adjusted forwards or backwards independently of the minute and seconds hands. This allows travellers to adapt to their new time zone without affecting the precision of their timekeeping.

Black dial

Like all Rolex Professional watches, the GMT-Master II offers exceptional legibility in all circumstances, and especially in the dark, thanks to its Chromalight display. The broad hands and hour markers in simple shapes – triangles, circles, rectangles – are filled with a luminescent material emitting a long-lasting glow.

Oystersteel

Rolex uses Oystersteel for its steel watch cases. Specially developed by the brand, Oystersteel belongs to the 904L steel family, alloys most commonly used in high-technology and in the aerospace and chemical industries, where maximum resistance to corrosion is essential. Oystersteel is extremely resistant, offers an exceptional finish once polished and maintains its beauty even in the harshest environments.