Rolex Double Red Sea Dweller Ref. 1665 Mark II, Thin case

Year of issue: 1967
Reference number: 1665
Condition: worn
Status: sold
Dealer country: Germany
Price in EUR € n/a


Very rare and nice/early Sea Dweller "double-red"case back straight written wot ID: 19050

  • screwed case, steel, acrylic glass, rotating bezel, screw-down crown, helium valve, thin case, no. d=40mm
  • MOVEMENT caliber Rolex 1570, automatic, chronometer, date
  • DIAL original Tritium.dial and hands, Mark II dial
  • BRACELET fliplock deployant clasp, original foldet oyster bracelet
  • * collector's item
  • very nice condition
  • 1967


Ralf Meertz


1967 saw the launch of the Oyster Perpetual Sea-Dweller, waterproof to a depth of 610 metres. To meet the needs of professional deep-sea divers, the case was equipped with a helium escape valve so that, during long decompression phases in hyperbaric chambers, the helium from the gas mixtures used could be released without risking damage to the watch. Learn more about the first Seadweller from my RPReport by following this link...

SEA-DWELLER 4000 - 1978

Rolex launched the Sea-Dweller 4000, waterproof to a depth of 1,220 metres (4,000 feet).