As pioneers of incorporating the first helium release valve into an accessible watch in 1968, this DOXA Sub 300T Aquamarine Automatic Men’s Watch goes to show that 50 years on, the brand is still radically innovating the world of diving. Not only did they create ground-breaking technology, but they also set a benchmark for professional diver’s timepieces and have since been the perfect choice for ocean explorers. At A Glance  Presented on a stainless steel bracelet attached by screws to ensure a secure fit and folding clasp with wetsuit extension 42.5mm stainless steel case with a water resistance of 300m Unidirectional rotating bezel Aquamarine dial with date window positioned at 3 o’clock Black and white hands, and markers with Super‑LumiNova® luminescent coating Domed scratch-resistant sapphire crystal with an anti-reflective coating Powered by a Swiss automatic movement 38-hour power reserve