I must disagree with You Tribe . I had recently bought a watch for sport . The HDD-600 wich comes from heavy duty series from Casio . And it has not hardened glass . You can scratch the glass just by touching mineral with your nail. That's why I were asking about this glass .Effectively, all mineral glass used in modern watch crystals is 'hardened'.
I must disagree with YOU Tribe . I recently bought a sport watch wich comes from heavy duty series from Casio - HDD-600 . The watch does not have the hardened mineral glass . You can scratch it just by pressing your nail against the mineral . PeaceEffectively, all mineral glass used in modern watch crystals is 'hardened'.