A Rolex Sea-Dweller 16660, Triple Six from 1983/84 with SN: 8057xxx. As the successor of the famous and well known Sea Dweller 1665, often called as a transitional reference, this was the first Rolex divers watch to have a sapphire crystal installed and offers a diving depth rating of 4000ft. As a tool watch for deep sea divers, this was obviously a practical and impressive feature. The improved water depth rating was thanks in part to a larger helium escape valve (HEV). Also having the new movement Caliber 3035 installed, which replaced the Caliber 1570 of the previous Sea-Dweller.
This watch: has a second generation glossy dial with white gold indices and light yellowish aged lume in excellent overall condition. Case might have been polished the past, but is in very good fat condition, with slight signs of prior use. The 83160 bracelet and 592 endlinks in very good polished condition with moderate stretch, claspcode M9 from 1988. As always, watch has been reviewed and adjusted by my Rolex authorized watchmaker. He changed all gaskets, replaced the Helium Escape Valve (HEV), crystal, tube and the spring webs with original Rolex parts, of course. Interesting fact: the new Rolex HEV’s have a bit a larger dimension in length, than the old ones – they always look out a bit off the case, what the old HEV’s didn’t. Watch has also passed a 10 Bar pressure testing recently and is waterproof according to it’s specification, even I do not recommend exessive diving session with a vintage watch and can not guarantee for waterproofness.Exchanged parts are coming with the watch, so the old HEV – if you want to go back to the originalconfiguration, but no waterproofness is given with the old part!!!!
Running strong with no indication for service in the near future. I perfect toolwatch for every day and ready to wear. Differential taxation §25A UStG.