Rolex Sea-Dweller Triple Six Ref. 16660, Serial 82, Black Dial Production Year: Serial 82***** (circa 1983) Movement: Automatic, Cal. 3035 Size: 40.0mm Wrist Size: 18.5cm Dial: Minor age-related deterioration Hands & Dial: Shows age-appropriate patina, giving a good impression Crystal: Visible scratches and marks Bezel: Age-appropriate scratches and marks Case: Scratches and marks Bracelet: Age-appropriate scratches and marks, some looseness Buckle: Age-appropriate scratches and marks This is the second-generation Sea-Dweller model, produced from around 1980 to 1991. It features a large helium escape valve and a sapphire crystal without a Cyclops lens, achieving a water resistance of 1220m. There are two types of indexes, with and without borders; this one has borders. Purchased in 2022 from Commit Ginza, and it was purchased after an overhaul at a workshop affiliated with Commit Ginza. Regarding authenticity, it has been brought to several Ginza-based pawn shops and confirmed to be genuine, so you can purchase with confidence. As this is a pre-owned item, there may be overlooked imperfections. Please make your judgment based on the images and your understanding.