Released in 1967, the Rolex Sea-Dweller has long been recognized as one of the most iconic specialist dive watches on the planet. While other dive watches were generally released to the public as water sports grew in popularity during the mid-century, the Sea-Dweller was focused at professional divers. Famously worn by commercial diving companies like COMEX, and the vehicle for Rolex to demonstrate revolutionary innovations like the Helium-Escape Valve, the Sea-Dweller is a legendary model with a legendary history. Here we have a ref. 116660 Deepsea, an even more extreme version of the Sea-Dweller with an incredible 3900m of water resistance, a larger 44mm case and the historically accurate cyclops-less sapphire crystal. The ultimate in dive watch technology, the Deepsea pushed the Sea-Dweller to new depths that were never thought possible.