Pre-owned Rolex Deepsea ref 126660 (2019) picks up where the original Deepsea ref. 116660 left off, but with some meaningful updates. At a glance, it has the same imposing design set. 44mm Oyster case, black dial, black Cerachrom bezel, but the proportions were refined slightly, most notably with a wider bracelet and clasp for better balance on the wrist. It still has the full Deepsea architecture, including the Ringlock system and a staggering 3,900 meters of water resistance. That’s where it really separates itself from the standard Sea-Dweller. While both share similar DNA and a helium escape valve, the Deepsea is meant for extremes. Thicker case, more advanced internal structure, and a depth rating that goes far beyond what most will ever need. The ref. 126660 also introduced the newer generation caliber, bringing with it improved efficiency and a longer power reserve. Shop Rolex Sea-Dweller Collection