To actually enjoy the finer particulars of the timepiece, OMEGA utilizes artificial sapphire crystal having a extremely scratch-resistant and anti-reflective therapy. Ahead of the machining and finishing procedures occur, the sapphire crystals are developed beneath the Verneuil method, also called flame fusion. The redesigned bracelet of the Rolex Submariner ref https://www.watchesworld.com/top-10-dive-watches/