Unpolished Rolex Sea-Dweller Ref 1665 MK1 from 1978

Year of issue: 1978
Reference number: 1665
Condition: hardly worn
Status: sold
Dealer country: United States
Price in US $ n/a


This is an excellent example of a Rolex Sea-Dweller from 1978. The unpolished case is super sharp and crisp. The original Mark I dial is pristine with cream colored lume on the dial and hands. This watch comes on a folded oyster link bracelet with flip lock clasp. The condition of this watch is pristine. They don't come much better than this.


Matthew Bain


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).