Description: ROLEX Model case Oyster, 40 mm, stainless steel and yellow gold colour Oyster architecture Monobloc middle case, screw-down case back and winding crown Material Stainless steel and yellow gold colour 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 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 Stainless steel, five-piece links Clasp Folding Oysterlock safety clasp with Easylink 5 mm comfort extension link Dial Black Details Highly legible Chromalight display with long-lasting blue luminescence