Rolex Oyster Perpetual Sea-Dweller DEEPSEA Watch. Watch hasa 44mm stainless steel case with Ring Lock System allowing the watch to withstand 2.98 metric tonnes of water pressure, and a unidirectional rotating ceramic bezel. Features a black dial, long lasting blue luminescent hands and hour markers, and Oyster bracelet with Glidelock adjustable clasp. Water resistant to of 12,800 feet (3,900 meters) with helium excape valve for extreme depths diving. Reference number 116660.