Toning or Corrosion
Entry posted by Allan C Ong ·
Coloration on some silver proof quarters...
I'm finding some of my Silver Quarter proofs some orange/brown coloration showing. Is this the coin getting toned or am I seeing the beginnings of corrosion? I was thinking of sending them in for slabbing but I don't know if I want to pay $12.50 for NGC to tell me that it's a no-grade...
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