To really appreciate the finer details of a timepiece, OMEGA uses synthetic sapphire crystal using a extremely scratch-resistant and anti-reflective treatment method. Ahead of the machining and finishing procedures take place, the sapphire crystals are generated under the Verneuil approach, also called flame fusion. The Rolex Submariner 124060, in result, https://www.watchesworld.com/top-10-dive-watches/