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<p>[QUOTE=&quot;Ferdyboy, post: 902847, member: 25361&quot;]Has anyone ever heard of the Philadelphia Mint striking proof coins by mistake?</p><p>&nbsp;</p><p>I found a 1974 (no mintmark) Kennedy Half that is surely a proof coin---it has a mirror finish, but no cameo effect at all.</p><p>&nbsp;</p><p>Could it possibly be a proof struck in San Francisco without a mintmark?</p><p>&nbsp;</p><p>I tried to scan the coin, but the mirror finish doesn&#039;t show up in the scan.&nbsp; I know that there are coins that have been chromed, but, if the case, the edge was not chromed.&nbsp; It appears as a normal clad copper edge.&nbsp; I am certain that if the coin were chromed, that the entire coin would have been chromed, including the edge. </p><p>&nbsp;</p><p>Could I have stumbled upon some super error coin?[/QUOTE]</p><p><br /></p>

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