Trapped by the frozen sea, but not by fear, Sir Ernest Shackleton led his stranded crew for almost two antarctic years. As his leadership, courage and optimism continue to captivate explorers around the world, were proud to introduce our second series inspired by his legacy. The 41mm Engineer III Endurance 1917 GMT features our Manufacture GMT Caliber RRM7337-C a true GMT chronometer wrapped in a 904L stainless steel case and shining with micro gas tube luminosity. Three complementary models are also available, each designed with unique features yet united by incomparable brightness and high-quality build.Sometimes there is no escaping the darkness. Gear up with micro gas tube luminosity and persevere with a bright, unwavering ally. On the GMT model, the 24-hour inner bezel features our revolutionary tubes for reading the home time in total darkness. The all-around glow extends to all four hands even the GMT hand and around the dial with fully illuminated hour markers. No matter which model you choose, youll have automatic micro gas tubes that break through the black expanse.Fully automatic and highly accurate, the BALL Manufacture GMT Caliber RRM7337-C is an officially certified chronometer. With true GMT status, its quick-set functionality lets you easily change the local 12-hour hand by using the crown. The GMT hand is completely unaffected while the seconds hands continues to move giving you uninterrupted precision. As the 12-hour hand jumps in one-hour increments, the date wheel moves in perfect synchronization and always indicates the correct date of your local time zone. The movement and all its smart functionality are shielded by 1,000 Gauss anti-magnetic protective technology.The most fitting word to describe 904L stainless steel: extreme. Featuring extra amounts of chromium, molybdenum, nickel and copper, 904L steel provides superior resistance to corrosion, rust and acids, along with unique hardness that allows it to withstand unexpected conditions and extreme environments. At 41mm in diameter and just 13.15mm thick, the 904L case of the GMT model is comfortable enough for everyday wear and tough enough for adventure anywhere.