Rolex Oyster Perpetual Sea-Dweller 4000 116600. Automatic Rolex caliber 3135 chronometer movement. 31 jewels, 28,800 vph and an approximate power reserve of 48 hours. Brushed and polished steel case 40mm diameter which is water resistant to 1,220 meters 4,000 feet. Black dial with index hour markers. Ceramic Bezel. Steel Oyster bracelet with safety catch, fliplock and Glidelock extensions. Box and papers dated February 2016. Our reference S21753.