For sale: pre-owned Rolex Sea-Dweller ref. 126660 DeepSea dial, with full set. This dial is a special edition, unveiled in 2014 to commemorate James Cameron's 2012 expedition into the Mariana Trench.The oyster perpetual rolexDeepsea in oystersteel with a cerachrom bezel insert in black ceramic and an oyster bracelet.Rolex seemed to want the new for 2018 reference 126660 to look similar to the outgoing 116660, so it kept one of the original Deepsea’s most controversial features. That is a silver rehaut ring around the dial which contains two phrases being “Original Gas Escape Valve” (referring to the automatic helium release valve) and “Ring Lock System,” which refers to how the case is constructed to ensure such high levels of water resistance. The silver ring itself is actually part of the Ring Lock and is a “high-performance nitrogen-alloyed stainless steel ring.” When writer, director, and adventurer James Cameron reached the depth of 10,908 meters, on the floor of the Challenger Deep (the deepest point in the ocean) at the bottom of the Mariana Trench, he had the Rolex Deepsea Challenge, a prototype watch that could withstand water pressure to a depth of 15,000 meters, was strapped on the mechanical arm as well as on Cameron’s wrist. BRAND ROLEX MODEL SEA-DWELLER DEEPSEA REFERENCE 126660 CASE MATERIAL STEEL MOVEMENT AUTOMATIC DIMENSION 44 MM DIAL BLACK BEZEL CERAMIC CRYSTAL SAPPHIRE BRACELET TYPE OYSTER BRACELET MATERIAL STEEL BRACELET LENGHT 19 CM ORIGINAL BOX YES ORIGINAL PAPERS YES YEAR 2018 CONDITION EXCELLENT