The Rolex Sea-Dweller 126600 is a professional diver's watch that is designed for extreme underwater conditions. It features a 43mm stainless steel case with a black Cerachrom bezel, a black dial with luminous hour markers and hands, and a date window at 3 o'clock. The watch is powered by a self-winding movement and is water resistant to 300 meters. It comes with a stainless steel Oyster bracelet and a fliplock safety clasp.