1985 Rolex Sea Dweller Ref. 16660 "Triple Six" MK4
Produced from 1978 to 1989, the 16660 “Triple 6” Sea Dweller was a massive technological upgrade from previous Sea-Dweller models. The majority of its design was carried over into the modern Sea-Dweller - it was one of the first Rolex models to feature a sapphire crystal, larger helium escape valve, and chunkier case, and doubled the already impressive water resistance level to 4,000 feet. The 16660 also saw the transition from matte to glossy dials like the Mark 4 pictured here.
A few other changes should be emphasized between the previous reference 1665 and 16660 - the date disc become a more legible off-white, the bezel became unidirectional, and the Triple Six was now powered by the caliber 3035, which offers a faster beat-rate than the previous caliber 1575, and a quick-set feature, adding even more convenience to the Sea-Dweller.
When it comes to vintage Sea Dwellers, a 16660 is the perfect choice for someone that wants a vintage Rolex diver without having to treat it like one.
The Sea-Dweller offered here is an excellent example of the reference with an extremely sharp case and excellent original dial. Take a look at the photos and condition description below:
Case: 40mm case in excellent condition as pictured. The case is free from any major scratching, dings, or dents, has very crisp brushing on the lug tops and bright polished case sides with pronounced lug bevels. Case serial is 8.8M dating production to circa 1985.
Bezel: Original unidirectional bezel with original insert in very good condition as pictured. The insert shows some minor wear. Bezel action is positive and smooth.
Dial/Hands: Original dial and hands in excellent condition with an even, light patina on the hour markers. The hands have been relumed in the past.
Caseback: Original caseback in excellent condition as shown with original engravings still sharp.
Crystal: Scratch-free sapphire crystal free from any marks.
Movement: Rolex caliber 3035 automatic movement with quickset date. The movement is in excellent condition and keeping great time. All functions work as they should. Service history is unknown.
Bracelet/Strap: Like new, fitted end rubber strap with flip-over clasp.
Box/Papers/Accessories: None, sold as watch only.