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Let's see your mechanical watches
- Thread starter Dr Roly
- Start date
Well, with experience you'll usually be able to tell by tapping the crystal with your finger nail, glass emits a sound or sensation that's more "clangy" or "clinky" (for want of a better description).
If that doesn't work, usually a plastic crystal is well hazed with numerous tiny scratches whereas the glass ones being tougher, tend to show more major scratches. Also, major scratches in plastic tend to have softer edges as compared to sharper edges for scratches in glass.
Note that you can always start polishing any crystal with an acrylic compound. If you see an improvement fairly quickly then the crystal is plastic, otherwise it's glass. The plastic polish won't hurt glass however glass polish will further haze plastic so start with the less aggressive material first.
Incidentally it's possible to hand polish lightly scratched sapphire crystals using diamond dust compound but if you find manual glass polishing to be tedious, then you ain't seen nothin' yet ...
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I started my Miyota 821A, today and yes, it def. runs a little faster forward than my 8215.
But you should check first whether the Saphire has got. an anti reflective coating or not, many modern watches feature that. If so you would either screw the whole glass up polishing a hole into the coating or you would end up polishing the whole coating down for a consistent look.
Good point, some brands do coat the outside face of the sapphire crystal with anti-glare.
Brandrea33
One Too Many
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Wearing the BLRO today 
Very nice! I've decided to forgo all jacket, boot, and other luxury item purchases for the next year so that I can get one of my grail watches in 2022. Either a no-date sub or polar explorer II. I was going to try and wait for the steel rolex bubble to burst before buying, but who knows when that will be. Seems like when it comes to steel rolexes, the best time to buy is yesterday.Wearing the BLRO today
Mineral is glass, acrylic is plastic. Touch a key gently against it you'll know.
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My last Zeppelin Hindenburg with Miyota 8215 got acrylic glass, which was mistakenly marked as mineral glass. No problem, you don't see the little scratches, when you look straight on the dial.
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DrVoel
New in Town
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I have a small collection of mechanical watches.
An Omega Seamaster, a Steinhart OVM, a Borealis Omega 300 homage, an orient Bambino dress watch, but my favourite by far is the Longines Legend Diver
An Omega Seamaster, a Steinhart OVM, a Borealis Omega 300 homage, an orient Bambino dress watch, but my favourite by far is the Longines Legend Diver
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I can now say, the classic Miyota 8215 starts much faster by swinging than the 821A and 82S5.
Brandrea33
One Too Many
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Wearing the SKX009j today.
I love the simple movement, shake and go... I had it regulated recently and it keeps decent time as well.
old photo
I love the simple movement, shake and go... I had it regulated recently and it keeps decent time as well.
old photo
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