The Rolex Sea-Dweller ref. 116600, often nicknamed the “SD4K,” was introduced in 2014 as a modern revival of the classic Sea-Dweller and produced for only a short period until 2017, making it one of the most short-lived contemporary Rolex sports models. It features a traditional 40 mm Oystersteel case with an Oyster bracelet, powered by the reliable automatic calibre 3135, and offers a professional-grade depth rating of 1,220 meters (4,000 feet) along with a helium escape valve for saturation diving. The watch combines vintage-inspired proportions with modern upgrades such as a black Cerachrom ceramic bezel with fully graduated minute markings and a “Maxi” dial with Chromalight lume for enhanced legibility. Notably, it retains the clean sapphire crystal without a Cyclops lens, staying true to the Sea-Dweller’s tool-watch heritage.