Built as the most extreme expression of the Sea-Dweller line, the Rolex Deepsea reference 116660 brings the collection's professional tool-watch character into a markedly more substantial 44mm stainless steel case. The black dial keeps the design direct and highly legible, with the date integrated into a layout defined by purpose rather than ornament. Its automatic movement suits the model's straightforward, daily-wearing practicality. At 17.7mm thick, it wears with the deliberate heft and planted stance collectors expect from a true Deepsea.