The Rolex Sea-Dweller model first made its appearance in 1954 with the goal of reaching depths no other model had or could. With the Sea-Dweller’s release, the first timepiece that incorporated a helium escape valve became available to the public. A major distinguishing feature is the Sea-Dweller has no cyclops until the most recent release at Baselworld 2017. The Everest Bands and accessories in this collection fit the Sea-Dweller 16600 (1988 - 2008) & 16660 (1978 - 1988).