Rolex Calibre 3235 automatic movement with chronometer certification, 70-hour power reserve; white dial featuring silver-tone hands and Roman numeral hour markers; fixed domed bezel in silver-tone stainless steel; round case shape measuring 36 mm in diameter; scratch-resistant sapphire crystal face; screw-down crown for secure sealing; solid case back; date display at the 3 o'clock position; folding Oyster clasp closure system; water resistant up to 100 meters or 330 feet.