The Rolex Sea-Dweller 4000 (Ref. 116600) is a robust and highly capable dive watch, designed for professional use. This pre-owned timepiece, in very good condition, features a 40mm stainless steel case and a sleek black dial with a black ceramic bezel. The automatic Caliber 3135 movement provides chronometer-certified accuracy and a 48-hour power reserve. A scratch-resistant ceramic bezel and sapphire crystal ensure lasting clarity. The stainless steel Oyster bracelet with a folding clasp offers a comfortable and secure fit. Designed for deep-sea exploration with over 120 ATM water resistance, it's a reliable and sought-after timepiece for serious divers and collectors.