Robust design and reliable performance The Bremont Supermarine S302 is a mission-ready mechanical timepiece with GMT function, 50-hour power reserve and 300m water resistance — all features that together yield the ultimate adventure companion. Encased in a compact 40mm stainless steel Bremont Trip-Tick® case with a domed anti-reflective, scratch resistant sapphire crystal and 24 hour uni-directional rotating bezel. Powered by a modified calibre BE-932AV automatic movement, chronometer rated to ISO 3159 standard. Specifications Case: 40mm Stainless steel Trip-Tick® case construction Caseback: Solid stainless steel screwdown with Supermarine airplane engraving Dial: Matte blue with Superluminova-coated hands & numerals Crystal: Domed sapphire Movement: Automatic, Bremont BE-93-2AV (ETA 2892-A2 base) with GMT Power Reserve: 50 hours Bracelet: Stainless steel Functions Chronometer certified, ISO 3159 rated GMT, second time zone, date at 3:00 Water Resistance: 300 meters (30atm) Bi-directional rotating GMT bezel with bi-color ceramic insert