Chipped crystals in vintage timepieces: what to do?

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From my research, a dremel + diamond polish paste can do the job.

That being said, it seems that crystals for Seikos can be easily sourced.

If it's flat, it's even easier!

Tom
 
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If you’re dealing with Speedmasters MkII and Mk4.5 you should be aware that the Tachy scale is printed on the underside of the crystal. Changing the crystal pretty much demands an Omega part. That said, they’re not horribly expensive and frequently come up for sale on eBay. I’m also aware of a custom sapphire crystal for the MkII in case you want to dump the mineral glass one.
 
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From my research, a dremel + diamond polish paste can do the job.
Hmm. The DIY approach doesn't make sense if I need to buy a power tool for a one-off job.