Accompanied by a Rolex presentation box.
Launched in 1967, the celebrated Sea-Dweller reference 1665 was the first wristwatch designed for use in saturation diving, fitted with a Rolex patent valve in the band and guaranteed waterproof to 610 meters depth. The valve was first developed on the Submariner model and allows helium and other gases to escape, enabling the watch to stand compression.
The present watch is from the so-called Mark III or Mk 3 series of the double red Sea-Dweller, in production between around 1970 to 1973, and distinguished by the printing on its dial. The double red designation is written directly on the dial and often darker and less intense than on the Mk 2 for example. The two double red lines show different sizes: the second line, SUBMARINER 2000, is smaller than the first line SEA-DWELLER. The 5 tips and the oval at the base of the Rolex crown are clearly defined. The overall impression of the fonts is thinner and less distinct than on the earlier versions.
Reference 1665 double red Sea-Dweller is illustrated in 100 Years of Rolex by F. & G. Mondani, 2008, p. 130.