The Rolex Sea Dweller, Ref. 1665, introduced in 1967, represents a milestone in professional dive watch history. Originally developed with COMEX, a French engineering company specializing in deep-sea operations, this timepiece was designed to withstand extreme underwater conditions. Featuring a helium escape valve and a robust stainless steel case, this iconic model marked the first commercially available Sea Dweller. With its classic black dial, bold luminescent markers, and unmatched durability, the Ref. 1665 embodies the rugged sophistication Rolex is known for. A true tool watch with historical significance, this piece offers both performance and timeless design.