The polished blue bi-directional rotating bezel is compelete with a bright orange GMT scale and helium-escape valve at 10 o'clock on the situation. Its amazing brilliant blue glow is richer and extended-lasting in comparison to the eco-friendly glow of Tremendous-LumiNova. Inside this reference can also be the so-named “Purple Sub” https://www.watchesworld.com/top-10-dive-watches/