18k yellow gold case with a 18k yellow gold bracelet. Tachymeter engraved bezel. Black mother of pearl dial with gold-tone hands and Roman numeral hour markers. Minute markers around the outer rim. Dial Type: Analog. Luminescent hands. Chronograph - sub-dials displaying: three: 12 hours, 30 minutes, and 60 seconds. Automatic movement. Scratch resistant sapphire crystal. Screw-down crown. Solid case back. Case diameter: 40mm. Round case shape. Oysterclasp clasp. Water resistant at 100 meters / 330 feet. Functions: chronograph, tachymeter, hour, minute, second. Luxury watch style. Watch label: Swiss Made. Rolex Cosmograph Daytona Mother of Pearl Chronograph 18k Yellow Gold Men's Watch116528BKMRO.