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Cosmic replacement crystal

efauser
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https://auctions.c.yimg.jp/images.a...42a8/i-img900x1200-1568900140wpzwat117861.jpg

I'd like to replace the crystal of this cosmic but not too sure how to go about it. I know that a special tool is needed to squeeze and pull the crystal off but I'm struggling to identify which one. I'm also struggling to locate a correct replacement crystal, I may have to go aftermarket.

Many thanks for the help
Is that the only photo available because the necessary tool is probably written on the back? Once you confirm which reference that is, finding a crystal shouldn't be difficult, assuming you know how to use a search engine.
 
Verdi
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I would go to a watchmaker.
The tool is Omega107 I think...... but it is not as easy to use. Also, not worth buying one for changing the glass once.
Watchmaker can also have or source the glass.

Google Sternkreuz, plenty of places to source one if you wanna get it yourself.
 
Archer
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Tool 107 is used for this:



At least I don;t recall there being another tool that I've used on Cosmics. If you know the case reference I can assist with the correct crystal parts number. I do not recommend using an aftermarket crystal, as the tension ring may not be stepped, and this can lead to dial damage and incorrect fitting/securing of the movement.

Cheers, Al
 
K
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Archer Archer
If you know the case reference I can assist with the correct crystal parts number.

Cheers, Al

aye, the caseback says
166026 - TOOL 107
I had no idea the latter of the inscription was a direct reference to the crystal remover.
 
Archer
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aye, the caseback says
166026 - TOOL 107
I had no idea the latter of the inscription was a direct reference to the crystal remover.

Crystal is 063PZ5123.

Cheers, Al
 
Chi_spur
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Archer Archer
At least I don;t recall there being another tool that I've used on Cosmics.

FYI - there is a Tool 105 for a slightly smaller (33mm-ish) Cosmic case size and a Tool 101 for the ladies (24mm-ish) version.

As you stated though - for the OPs model, Tool 107 is correct.
 
K
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EIhg1s9.jpg


Archer Archer
I do not recommend using an aftermarket crystal, as the tension ring may not be stepped, and this can lead to dial damage and incorrect fitting/securing of the movement.

Cheers, Al

Dear AI

I've finally been able to start working on this, and I've noticed that my cosmic actually has the correct original crystal, and I am now content to leave the crystal on the watch - scratches and all - as a personal preference.

However it seems like this crystal is not fitted correctly (there is a large gap between the crystal rim and the case) and I wanted to quickly ask and see what you think is going on here. Is this gap purposefully left to allow the tool to grip the crystal and pull?

Thanks for your help
 
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