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44 mm Oystersteel case. Screw-down winding crown with Triplock triple waterproofness system. Bidirectional rotatable 60-minute graduated bezel with blue Cerachrom insert in ceramic, with moulded, recessed graduations and numerals coated with platinum. Scratch-resistant sapphire crystal. White dial with Chromalight display and long-lasting blue luminescence. Perpetual, mechanical, self-winding Calibre 4162 Manufacture Rolex, with paramagnetic blue Parachrom hairspring, Paraflex shock absorbers, and bidirectional self-winding via Perpetual rotor. Functions: centre hour and minute hands; small seconds at 6 o'clock; programmable countdown with mechanical memory and on-the-fly synchronization; stop-seconds for precise time setting. Power reserve approximately 72 hours. Oyster bracelet with three-piece solid links in Oystersteel. Folding Oysterlock safety clasp with Easylink 5 mm comfort extension link. Waterproof to 100 metres / 330 feet. Superlative Chronometer certified.