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All Forums Category: US Coins and Currency Forums Forum: US Modern Coins

1970-S Proof Set. Really Strange Toning! What Caused It?

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jbuck
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 Posted 05/30/2019  12:24 pm  Show Profile   Bookmark this reply Add jbuck to your friends list Get a Link to this Reply

Quote:
I opened the case. Pulled out the Kennedy and used a cotton swab to wipe the spots that were effected. I have attached the picture. The green stuff went away but the areas are still dull. The plastic case was not effected.
Very interesting.
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