Inspired by the groundbreaking dive watches of the 1950s, this 43mm brushed stainless steel watch has a uni-directional rotating top ring and a 30 ATM rating, meaning it’s resistant to water and water pressure to a depth of 990 feet. If accidentally bumped, the top ring will show that more dive time has elapsed, as a safety feature. It has Swiss Super LumiNova accents at each minute position within the first 15 minutes, then at every five minutes, for easy demarcation of diver safety stops while ascending. Additional features include a screw-down crown, a case back secured by six screws, a scratch-resistant sapphire crystal with anti-reflective coating, a black dial with Swiss Super LumiNova accents on the index and hands and a vegetable-tanned, weatherproof Bridle Leather strap. Filson watches are built to last, and covered under the comprehensive, best-in-class Shinola warranty.