Rolex Sea-Dweller

Rolex 136660 bk Men's Watch.  This robust watch features a 44mm Oystersteel case with a screw-down back and a screw-down crown equipped with a triplock triple waterproofness system. It includes a unidirectional rotatable bezel with a 60-minute graduated scratch-resistant Cerachrom insert in ceramic, with numerals and graduations coated in platinum. The domed crystal is made of 5.5mm-thick scratch-resistant sapphire, protecting a striking black dial. Powered by the Rolex calibre 3235 perpetual self-winding movement, it offers centre hour, minute, and seconds hands, an instantaneous date with rapid setting, and stop-seconds for precise time adjustments, along with approximately 70 hours of power reserve. The watch is completed with an Oyster bracelet featuring flat three-piece links, a folding Oysterlock safety buckle, and the Rolex Glidelock extension system. With a waterproof capability of up to 3,900 meters (12,800 feet), it also features a helium escape valve for professional diving use.