18k yellow gold case with a black rubber strap. Black cerachrom bezel. Black dial with 18k yellow gold hands and diamond hour markers. Tachymeter scale around the outer rim. Dial Type: Analog. Luminescent hands. Chronograph - three sub-dials displaying: 12 hours, 30 minutes, 60 seconds. Rolex Calibre 4130 Automatic movement, based upon Rolex 4030, containing 44 Jewels, bitting at 28800 vph, and has a power reserve of approximately 72 hours. Scratch resistant sapphire crystal. Screw down crown. Screw down case back. Round case shape, case size: 40 mm. Folding clasp. Water resistant at 100 meters / 330 feet. Functions: chronograph, hour, minute, second, chronometer. Cosmograph Daytona Series. Dress watch style. Watch label: Swiss Made. Rolex Cosmograph Daytona Chronograph Automatic Chronometer Diamond Black Dial Watch 116518BKDR.