Rolex Cosmograph Daytona Steel Yellow Gold Black Dial Watch 116503 Box Card. Officially certified chronometer self-winding movement. Rhodium-plated, oeil-de-perdrix decoration, straight line lever escapement, monometallic balance adjusted to 5 positions, shock absorber, self-compensating free sprung Breguet balance spring, Microstella regulating screws, hack mechanism. Stainless steel and 18K yellow gold case 40.0 mm in diameter. Special screw-down push buttons. Triplock winding crown protected by the crown guards. 18K yellow gold tachymeter engraved bezel. Scratch resistant sapphire crystal. Black dial with raised luminous yellow gold indexes. Outer 1/5th seconds track. Gold outlined subsidiary dials for the seconds, the 12-hour and 30-minute registers. Luminous yellow gold and black baton hands. Stainless steel and 18K yellow gold oyster bracelet with flip-lock clasp.