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Clocks, Watches/Pocket watch yellowing of crystal

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Expert: - 5/7/2008


Question
I have an Elgin, 1913 pocket watch size 16S 17J in a gold filled case. It's working and I've had it for almost a year but it has always had a yellowed crystal. My question is, is this yellowing possibly intentional or just from age? If from age, is it a sign of a potential problem with the watch?

Answer
Jason,

The degradation of the plastic emits corrosive gases that cause rust on Hands, and possibly other internal movement components.

Newer plastics are not as likely to change.

If possible, change the crystal.  The watch will look better and you won't have to worry about any damage in the long term.

Kind regards,

Melvin

Clocks, Watches

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Volunteer

Melvin Mills

Expertise

I can answer questions regarding the repair of quartz watches and antique American pocket watches. I cannot give appraisals. My expertise is in watches, not clocks.

Experience

I am trained to repair quartz and mechanical watches, both modern and antique. My business focus is on quartz watches and antique pocket watches. I have been in this field for almost 5 years.

Organizations
I belong to the National Association of Watch and Clock Collectors (NAWCC).

Education/Credentials
I am a Certified Master Horologist from the National Institute of Horology.

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