40mm white gold case with black Oysterflex bracelet, screw down crown. Fixed black monobloc cerachrom bezel showing tachymeter markings. Black dial featuring luminous silver-tone hands and diamond hour markers alongside minute markers around the outer rim. Analog display. Chronograph function equipped with three sub-dials: one for 60 seconds, another displaying minutes up to 30, and a third indicating elapsed hours (12 hours). Powered by Rolex Calibre 4130 automatic movement based on the Rolex 4030 containing 44 jewels, beating at 28800 vph. Approximate power reserve of 72 hours. Features a scratch-resistant sapphire crystal glass surface and solid case back. Water resistant up to 100 meters / 330 feet (about 10 ATM). Functions include chronograph, hour, minute, second indication. Round case shape. Item variations: 116519LN
