Rolex Double Red Sea Dweller

The Rolex Double Red Sea-Dweller, nicknamed for its two bold lines of red text, first surfaced in the late 1960s as a tool watch for deep-sea divers who needed serious reliability like, real-deal depth-proof. Built tough with a helium escape valve, it helped change the game for saturation diving. Today, snagging a clean example can feel like searching for buried treasure, but places like Tropical Watch make finding these icons way less of a guessing game.