Rolex Cosmograph Daytona. Perpetual, mechanical, self-winding movement. Functions: centre hour, minute and seconds hands, small seconds hand at 6 o´clock. Chronograph (centre hand) accurate to within 1/8 of a second, 30-minute counter at 3 o´clock and 12-hour counter at 9 o´clock. Stop seconds for precise time setting. Material: steel.