InDebtButOnTime
1935
Hmm... seems like sapphlex (sapphire coated mineral glass) would have the scratch resistance of sapphire with the lesser propensity to shatter compared to an all sapphire crystal. Maybe
May 01, 2023,17:33 PM
Seiko was on to something there?
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Watch Crystal Materials
By: cazalea : April 30th, 2023-14:30
At the request of a regular WPS reader, I did some research on the various materials used to create Watch Crystals or Watch Glasses (archaic term). A Watch Crystal covers the dial of the watch, functioning as a Windshield or Windscreen. Watch Crystals are...
An additional discussion on watch crystals
By: cazalea : April 30th, 2023-21:53
In addition to the question of materials that a crystal is made from (or made of?), there is the issue of installation into the watch case, which is also material-specific . Plastic crystals are resilient / flexible, and they can be pressed into a case us...