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<p>[QUOTE=&quot;toned_morgan, post: 8288026, member: 97258&quot;]Older coin flips were usually made of PVC, which creates green residue when it reacts with copper. The toning on your coin is not from the PVC or whatever plastic was in the flip. My guess is that it was polished and then artificially toned on the obverse to perhaps increase eye appeal (if it was in a collection book face up, that would make sense because the reverse seems untouched)[/QUOTE]</p><p><br /></p>

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