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<p>[QUOTE=&quot;rodeoclown, post: 1299936, member: 34005&quot;]Well, copper is the most chemically reactive numismatic metal in the US. Since this penny is 99.2% zinc with copper plating, I&#039;d imagine a number of things could have caused this penny to have a more drastic change in color from the others, possibly it was exposed to heat or higher temperatures (zinc involved gives it the reddish or dark yellow to make it appear more goldish), etc. The honest truth though, this came from the mint as a circulated coin that ended up in a bank roll you received (from the time it left the mint to the time you received it, who knows where it&#039;s been, how many pockets it was in, etc. I&#039;d say it&#039;s still worth a penny though.[/QUOTE]</p><p><br /></p>

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