40mm Round 18K White Gold Oyster Case Chronograph watch with Fixed 18K White Gold Bezel engraved tachymeter markings, Blue Dial featuring silver-tone hands and Arabic numeral hour markers. Equipped with minute markers on the outer rim, Luminescent coating for hours and minutes, Analog display. Powered by Rolex Calibre 4130 automatic movement with date function (at 6 o'clock), offering a 72-hour power reserve. Includes three sub-dials: one displaying the elapsed seconds up to 60 minutes, another showing the remaining minutes of the hour split into hours and minutes for tachymeter functions, and the third indicating hours. Features screw-down crown, scratch-resistant sapphire crystal, solid case back, Oysterlock clasp. Water resistant to 100 meters / 330 feet.