To really appreciate the finer aspects of a timepiece, OMEGA employs artificial sapphire crystal using a remarkably scratch-resistant and anti-reflective treatment method. Prior to the machining and ending processes occur, the sapphire crystals are created under the Verneuil process, also referred to as flame fusion. The Rolex Submariner 124060, in https://www.watchesworld.com/top-10-dive-watches/