18 kt Yellow Gold & Stainless. Blue Face with matching Dial. Oyster Perpetual with Triplock Crown. Crystal is a synthetic sapphire which offers protection against scratches and scuffs under the most arduous conditions. The braclet is especially designed which includes extension links and a Fliplock safety clasp to help protect against loss. The Rolex is self-winding with a Perpetual Rotor movement. The Submariner is pressure proof to 1000 feet.