Rolex Oyster Perpetual Sea Dweller DEEPSEA 116660. Case diameter 44mm. Water resistant to 3,900 meters (12,800ft) Automatic Chronometer movement. D Blue dial with luminous blue hour markers and hands. 60-minute graduated Cerachrom disc Uni-directional rotatable bezel, the numerals and graduations are filled with platinum by a patented Rolex technique. RINGLOCK system which allows the case to withstand 2.98 metric tonnes of water pressure. Steel Oyster bracelet with Double Expansion System, manufactured from solid 904L steel, the bracelet can be adjusted to wear over a dive suit up to 7mm thick, double expansion system with flip lock. This model is a tribute to the partnership between Rolex and filmmaker-explorer James Cameron, on 26th March 2012, The expedition’s submersible piloted by James Cameron descended 10,908 meters (35,787 feet) to reach Challenger Deep, the deepest point in the worlds ocean. Box and papers dated April 2016.