Pre-owned Rolex Sea-Dweller ref. 16600 (1990) was a fixture of the Rolex portfolio from the late 1980s to the late 2000s. It has many of the same design elements as its predecessor, the Triple Six ref. 16660, including a scratch-resistant sapphire crystal and the same depth rating, but with the caliber 3135, an update from the previous caliber 3035 with a longer power reserve. It’s interesting to note that, with this steel and black design set and 40mm case, it is similar in overall aesthetics to the less water-resistant Submariner, complete with a date display without the usually present Cyclops magnifier. It’s a fascinating model to consider if you’re in the market for a luxury dive watch that brings something slightly different to the table. Shop Rolex Sea-Dweller Collection