The Rolex Deepsea Sea-Dweller M126660-0002 is a luxury watch that is designed for the professional diver. This watch has a stainless steel case and bracelet, with a black dial and a unidirectional rotating bezel. It is powered by a self-winding mechanical movement and is water resistant to 3900 meters (12,800 feet). It has a helium escape valve and a scratch-resistant sapphire crystal. It features luminescent hour markers and hands, a date window at 3 o’clock, and a power reserve indicator at 6 o’clock. The watch is completed with a folding Oysterlock safety clasp and a Glidelock extension system.