The Historic legacy on the Moonwatch includes a Hesalite crystal and an aluminum bezel with tachymeter scale. Hesalite as an alternative to sapphire with the crystal is the most authentic allusion on the Moonwatch’s heritage, but Hesalite scratches easily, as also became apparent inside our carrying test over the wrist. https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/