Pre-owned Rolex Sea-Dweller Deepsea ref 136660B (2025). Rolex upgraded its capable deep saturation diver in 2022 via the third-generation ref. 136660 for sale here. Like its predecessor, ref. 126660 can contribute its incredible water resistance to features such as the Helium Escape Valve, Triplock screw-down crown, Ring Lock System, and thicker sapphire crystal. As with everything Rolex does, the ref. 136660 has a similar design as its predecessor but with several noteworthy refinements. First, the bezel is slightly narrower to show off the chamfered crystal. Furthermore, the date display is 8% larger, the titanium material used on the case back has been rebranded as RLX titanium, and the dial now uses improved Chromalight luminescent material. Lastly, Rolex has removed the Glidelock extension, which previously allowed the wearer to adjust the bracelet to fit over the sleeve of a wetsuit. There are two variations of the watch, one with a black dial and bezel and the other with the James Cameron Rolex D-Blue gradient dial and a black bezel. Shop Rolex Sea-Dweller Collection