This Rolex Sea-Dweller Deepsea ref. 116660 (2017) features a 44mm stainless steel case with a titanium caseback and a black ceramic timing bezel. The deepblue chromalight dial with green “Deepsea” lettering offers excellent legibility in deep waters. It comes with an Oyster bracelet and is powered by the 3135 movement, designed for professional divers.