ROLEX SEA-DWELLER 4000 "TRIPLE SIX"
The Rolex SEA-DWELLER is a further proof, that the Geneva manufacturer has always been anxious to develop timepieces, working accurately under extreme conditions and servicing its wearer.
- reference 16660
- year of manufacture ca. 1981
- stainless steel case
- stainless steel Oyster bracelet with fliplock clasp
- sapphire crystal
- movement caliber 3035 - automatic
- serviced and guaranteed by Rolex Geneva
Of course, also the company COMEX was responsible, that Rolex dedicated research and development to this particular model-range.
The „Compagnie Maritime
d’Expertise“ - divers faced more and more problems while using the Submariner model reference 5513.
Not to drift off too much in physics, the only thing to be said is:
The use of helium at deep-sea-diving (decompression), starting in the second half of the 60’s, resulted in an overpressure inside any watch which blasted the glass of the timepiece off. A
solution had to be found to solve this problem. How could the gas escape of the watch before the described damage occurred?
For this purpose Rolex developed a „one-way-pressure-valve“ which kept the watch waterproof, also in extreme depth, and allowed the gas to escape during decompression - simple but
brilliant. Apart from the so called „pre-production-models“ (patent-pending, waterproof up to 500m/1650ft, slightly thinner case and only SEA-DWELLER printed in red on the dial)
reference 1665/0 remained during the whole production period quite untouched. As usual with Rolex there were several dial variations, but the overall concept remained unaffected until production
ceased in ca. 1981. It is remarkable to note, that the successor of the SEA-DWELLER 1665/0, reference 16660, entered the market in approximately 1979. Therefore both references have been
simultaneously in production for roughly 2 years. The most significant differences between both models were, that the so called „Triple Six“ had been equipped with a synthetic sapphire-crystal
glass, a new „gas escape valve“ and was now waterproof up to 1220m or 4000ft depth - a sensation.
Our SEA-DWELLER, reference 16660, dated back to the year 1981 and was one of the earliest of this model range. She was overall stunning and could have been considered as almost in „New Old Stock“
condition. Moreover important, that she still beared the original charismatic matte dial with printed indexes which has been fitted until early 1981. As usual serviced and guaranteed
through Rolex in Geneva, this rare example of a true and unmolested „Triple Six“ may be
considered as highly collectible. Compliments and our gratitude to the new owner.