Rolex Sea-dweller Deepsea Black Dial Oyster Bracelet 136660

44mm Oystersteel case, screw-down back, screw-down crown with triplock triple waterproofness system, unidirectional rotatable 60-minute graduated, scratch-resistant cerachrom insert in ceramic, numerals and graduations coated in platinum bezel, domed crystal with 5.5 mm-thick scratch-resistant sapphire, black dial, Rolex calibre 3235 perpetual self-winding movement with centre hour, minute and seconds hands, instantaneous date with rapid setting, and stop-seconds for precise time setting, approximately 70 hours of power reserve, Oyster bracelet with flat three-piece links, folding Oysterlock safety buckle with rolex glidelock extension system. Waterproof to 3,900 metres / 12,800 feet, helium escape valve.