Rolex Cosmograph Daytona Chronograph Automatic Diamond Black Dial Watch 116518BKDR

18k yellow gold case, black rubber strap. Cerachrom black bezel. Black dial with diamond hour markers and 18k yellow gold hands. Analog dial type features luminescent coating on hands and appliques. Tachymeter scale present at the outer rim of the dial allowing speed measurement. Chronograph functions include three sub-dials displaying seconds, minutes, and hours respectively. Equipped with Rolex Calibre 4130 automatic movement containing 44 jewels operating at 28800 vph, offering approximately 72 hours power reserve. Sapphire crystal provides scratch resistance for the display surface. Screw-down crown ensures water-tightness when changing the battery or adjusting date (this model lacks date function). Screw down case back enhances durability and maintains water-resistance standards. Round shaped case measuring 40 mm in diameter. Features a folding clasp mechanism ensuring secure yet comfortable wrist attachment. Rated at 100 meters / 330 feet water resistance depth suitable for swimming activities but not diving. Functions feature analog hour, minute, second hands sub-dials displaying 12 hours, 30 minutes, and seconds elapsed chronograph operation has a power reserve of around 72 hours is an automatic movement utilizes the Calibre 4130 mechanism includes tachymeter capability contains 44 jewels operates at beats per hour (bph) rate of 28800 vph scratch resistant sapphire crystal construction diamond indicators on black dial screw down bezel and crown ceramic bezel in black color analog display style dress watch aesthetic Swiss Made label. Model: Cosmograph Daytona Series Reference/Model Number: 116518BKDR