The Rolex Sea-Dweller ref. 16600 from 2003 represents the final era of the classic tool-watch Sea-Dweller before Rolex shifted toward larger and more modern designs. Built from stainless steel with a 40mm case, aluminum bezel insert, thick sapphire crystal, and a depth rating of 1,220 meters, it was engineered for professional saturation diving while maintaining a clean and understated look thanks to the absence of a Cyclops lens over the date. The 2003 models are especially appreciated because they combine vintage character with modern reliability, and feature the cleaner no lug-holes case design, giving the watch a more refined and seamless appearance compared to earlier references.