Stainless steel case with a stainless steel Rolex oyster bracelet with 18kt yellow gold center links. Fixed 18kt yellow gold bezel showing tachymeter markings. Black dial with yellow gold-tone hands and luminous stick hour markers. Minute markers around the outer rim. Dial Type: Analog. Luminescent hands and dial markers. Chronograph - three sub-dials displaying: 60 second, 30 minute and 12 hour. Rolex calibre 4130 automatic movement with a 72-hour power reserve. Scratch resistant sapphire crystal. Screw down crown. Solid case back. Case size: 40 mm. Round case shape. Oysterlock clasp. Water resistant at 100 meters / 330 feet. Functions: chronograph, hour, minute, second, chronometer. Luxury watch style. Watch label: Swiss Made. Item Variations: 116503-78590. Rolex Cosmograph Daytona Steel and 18K Yellow Gold Oyster Mens Watch 116503BKSO.