The Rolex Oyster Perpetual Sea-Dweller 116600 

Is a 40mm in a beautiful stainless steel case with helium escape valve for extreme depths diving, unidirectional rotating bezel with engraved black Cerachom insert, black dial, Chromalight appliques on hands and hour markers, and Oyster bracelet with Oysterlock folding clasp, Glidelock extension system, and Fliplock extension link. Also, is Water resistant up to 4,000 feet and (1,220 meters). This design was introduced at Baselworld 2014.