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<p>[QUOTE=&quot;alurid, post: 3858624, member: 81991&quot;]The copper plating is only 8 microns thick and does not add much weight.</p><p>Your coins surface looks quite grainy like the copper was removed chemically.</p><p>18 years of exposure to the environment could also make the surface look grainy.</p><p>I don&#039;t think there is any way to prove that it came from the mint unplated, so it can not be called a mint error.[/QUOTE]</p><p><br /></p>

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