I have Seamaster Cosmic from 70's which has flat mineral glass. Omega reference for the glass seems to be TN5190. I would like to replace the mineral glass with sapphire and I am looking for correct size sapphire. From where I could find the specifications for glass TN5190?

 

063TN5190 | GLASS MINERAL D31 H2

Cheers, Al

 

Great! Thanks Archer!

Any idea from where I could find crystal information for Zenith watches?

 

You can always remove the crystal and measure it - that is how people handle this when they don't have access to factory information.

 

If you replace it with a sapphire why do you bother buying a genuine Omega? A generic japenese sapphire si much cheaper. For what Zenith watch are you looking for?

 

He didn't say that actually, so not quite sure what you are referring to...