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<p>[QUOTE=&quot;medoraman, post: 4640251, member: 26302&quot;]I will defer to the chemists. What I see is an acid or similar placed on the coin that dissolved the nickel and left the copper. That is why there is metal missing. </p><p><br /></p><p>Reminds me of how the Romans used 95 copper/5% silver planchets and struck &quot;silver&quot; coins. They threw the planchets in barrels and filled with seawater. The seawater dissolved the copper but left microscopic silver on the surface. When they struck the coin, the silver melted and coated the coin with a miscroscopic layer of silver. It looked silver for a few days at least....</p><p><br /></p><p>Same thing happening here. Anyone know an acid that dissolved nickel but not copper?[/QUOTE]</p><p><br /></p>

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