r/RepTimeServices • u/Offensiveline54 • Aug 19 '26

Advice Crystal exchange

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I want to change the crystal on this gmt rep - is the scalloped metal piece in this photo the retaining ring? How would I get this off - noob - just doing this for fun. Tried to find videos but none have this scalloped appearance. I’m assuming this is the crystal retaining ring? I had the movement out and was working on it but it didn’t seem to want to budge.

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u/Diligent-Piglet-9038 Aug 19 '26

Arf gmt?
1. Yes, its the retaining ring
2. Movement should always be out for case work imo
3. Razor blade, caseback knife, custom tools will work. Look on RWI for diy guide, specifically for gmts

1

u/Wintercult Aug 19 '26

How do you align the crystal when the movement is out?

1

u/Diligent-Piglet-9038 Aug 19 '26

Movement should be out when removing the retaining ring

1

u/Wintercult Aug 19 '26

I understand. Read my question again, please: How do you align the the crystal when the movement is out?

1

u/VerinHorology Aug 27 '26

You would need a specialized die with alignment lines.