This vintage Rolex Sea-Dweller "Triple Six" Ref. 16660 is one of the most sought-after transitional models, bridging the gap between vintage charm and modern Rolex tool-watch functionality. Produced in the early 1980s, it introduced key innovations such as a sapphire crystal, high-beat Caliber 3035, and improved 1220m/4000ft depth rating, while retaining the classic matte dial with large tritium plots ("pallettoni"). This particular example is in pristine condition, exceptionally well preserved, and comes complete with its original papers and period-correct box—a rare find for collectors. The perfect blend of heritage and technical evolution, the Ref. 16660 is a must-have for vintage Rolex enthusiasts looking for historical significance and investment potential.