Oyster Perpetual 28 Automatic Chronometer Blue Dial Ladies Watch with stainless steel case and bracelet, fixed bezel, analog display featuring luminous silver-tone hands and hour markers including minute markers around the outer rim. Equipped with Rolex Calibre 2232 automatic movement (54 components), chronometer certified at 28800 vph for approximately 55 hours power reserve. Sapphire crystal provides scratch resistance. Screw-down crown, solid case back; round shape measures 28 mm in diameter and features an Oysterlock clasp. Water resistant to 100 meters (330 feet).