What type of glass is used in the watches?

The A Grade uses Hardlex mineral crystal. Hardlex is harder and more scratch-resistant than regular mineral crystals because of the added boron and proprietary heat treatment.

Superclone grade use Sapphire crystal. Sapphire is a nine on the Mohs hardness scale (to put that into context, diamond is the hardest at 10). Without a doubt, sapphire crystal is the most scratch-resistant watch glass on the market. It’s always useful to have a scratch-resistant dial, particularly if you travel a lot or you wear your watch on a daily basis. Another benefit of the sapphire crystal is that it brings clarity to dials, which means the visibility on sapphire glass watches is excellent.