Model case Oyster, 40 mm, yellow gold Oyster architecture Monobloc middle case, screw-down case back and winding crown Diameter 40 mm Material 18 kt yellow gold Bezel Bidirectional rotatable 24-hour graduated bezel. Two-colour grey and black Cerachrom insert in ceramic, moulded numerals and graduations Winding crown Screw-down, Triplock triple waterproofness system Crystal Scratch-resistant sapphire Water resistance Waterproof to 100 metres / 330 feet Movement Perpetual, mechanical, self-winding, GMT function Calibre 3285, Manufacture Rolex Precision -2/+2 sec/day, after casing Functions Centre hour, minute and seconds hands. 24-hour display. Second time zone with independent rapid-setting of the hour hand. Instantaneous date. Stop-seconds for precise time setting Oscillator Paramagnetic blue Parachrom hairspring. High-performance Paraflex shock absorbers Winding Bidirectional self-winding via Perpetual rotor Power reserve Approximately 70 hours Bracelet Jubilee, five-piece links Material 18 kt yellow gold Clasp Folding Oysterlock safety clasp with Easylink 5 mm comfort extension link Dial Tiger iron