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<p>[QUOTE=&quot;GDJMSP, post: 1617711, member: 112&quot;]That&#039;s not rust but it&#039;s the same kind of thing - corrosion. Could be wrong, but it looks like some kind of corrosive liquid got on the coin at some point and has caused that along with the dark discoloration.</p><p><br /></p><p>I dunno, but whatever it was from the looks of things it could still be active - meaning there may still be some of it on the coin. I think I would probably try rinsing thoroughly in xylene, then allow the coin to dry. Then rinse in distilled water, stand the coin on edge and allow it to dry for 24 hrs. Then put it in a good holder and store properly.[/QUOTE]</p><p><br /></p>

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