Rolex “Double Red” Sea-Dweller 1665/0

The exceptionally rare and collectible Rolex Oyster Perpetual ‘Double Red’ Sea-Dweller 1665/0. In 40mm steel case, Automatic Rolex Calibre 1575 Chronometer movement. Thick,
High-Dome acrylic crystal. Original matt black dial Swiss T-25 with  Rotating Bezel. Steel Oyster Lock Bracelet. Serviced by a renowned accredited Rolex service centre and fully verified 2024, Box and papers dated 1974.

The Rolex Double Red Sea-Dweller (Ref. 1665) was introduced in the late 1960s as a professional dive watch developed with COMEX and U.S. Navy divers. Its nickname comes from the two lines of red text on the dial reading “SEA-DWELLER” and “SUBMARINER 2000.” Rated to 2000 feet (610 meters), it featured a helium escape valve—a groundbreaking innovation for saturation diving. Produced until the mid-1970s, the Double Red 1665 is highly collectible due to its rarity and transitional role in Rolex’s dive watch evolution. Early models had “Mk” dial variants, each with unique typographic characteristics prized by collectors today.