The vintage Rolex Sea-Dweller reference 1665 with a rare MK2 Tiffany & Co. rail dial is an extraordinary collector’s piece that combines tool watch heritage with retail exclusivity. The MK2 dial, known for its “rail” text alignment, is further elevated by the coveted Tiffany & Co. double signature, making it one of the most desirable variants of the 1665. Designed for professional saturation divers, the Sea-Dweller was Rolex’s ultimate evolution of the Submariner, featuring a helium escape valve and impressive 610-meter depth rating.

This example remains in excellent condition, with a crisp case that retains strong lines, a beautifully aged dial with matching creamy patina on the luminous plots and hands, and a well-preserved bezel insert that completes its vintage charm. The Tiffany & Co. signature adds an additional layer of rarity, representing the intersection of Rolex’s technical innovation and luxury retail history. A true grail for Rolex enthusiasts, this MK2 Tiffany & Co. 1665 stands as both a professional diving instrument and a rare collectible treasure.