SEA-DWELLER 'DOUBLE RED', REFERENCE 1665 STAINLESS STEEL WRISTWATCH WITH DATE AND BRACELET CIRCA 1970
Calibre: cal. 1570 automatic, 26 jewels
Movement number: D'052'537
Case: stainless steel Oyster, helium escape valve, screw-down crown and back
Case number: 2'930'359
Closure: stainless steel Rolex Oyster bracelet with integrated folding clasp
Dimensions: 40mm diameter, bracelet circumference approximately 175mm
Signed: case, dial and movement
In the late 1960’s Rolex started development of a new watch after deep-sea divers bringing up a regular problem of popping-off crystals on their trusted Rolex Submariners. The issue was that during saturation diving helium could get trapped inside the watch and during decompression the helium would expand and push the crystal off of the watch. The results of these developments came to the market in 1967 under the name Sea-Dweller. Rolex had released the first ever watch including a patented helium escape valve which lets trapped helium inside the watch escape through a valve on the side of the case, but still keeping the watch waterproof for up to 610 meters. These first production model Sea-Dwellers feature two distinguishable lines of bright-red text, which gives it the nickname ‘Double-Red’ among watch collectors and aficionados.
This particular Sea-Dweller is an early ‘Double-Red’ variation which features a Mark II dial in original preserved condition. This dial is distinguishable due to its smaller font of the red font ‘SUBMARINER 2000’ and through the particular shape and smaller size of the ‘O’ of the Rolex coronet.