The Historic legacy from the Moonwatch features a Hesalite crystal and an aluminum bezel with tachymeter scale. Hesalite in lieu of sapphire with the crystal is considered the most reliable allusion on the Moonwatch’s heritage, but Hesalite scratches conveniently, as also became apparent in our carrying test within the wrist. https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/