Rolex Daytona Steel Yellow Gold Zenith Movement Mens Watch 16523 Box Papers. Zenith-based automatic self-winding chronograph movement. Officially certified chronometer. 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. White dial with luminous baton hour markers. Outer 1/5th seconds track. Gold outlined subsidiary dials for the seconds, the 12-hour and 30-minute registers. Yellow gold baton hands. Stainless steel and 18K yellow gold oyster bracelet with flip-lock clasp. Will fit up to 7 3/4″ wrist.