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<p>[QUOTE=&quot;mikediamond, post: 76082, member: 1859&quot;]Nickels are not &quot;silver plated&quot;.&nbsp; They are a solid alloy of 75% copper and 25% nickel.&nbsp; Your coin could have an added layer of copper that is given the name &quot;copper wash&quot; or &quot;sintered plating&quot;.&nbsp; It is a common, but poorly understood phenomenon that dates back at least to the 1950&#039;s.&nbsp; The extra copper may be deposted in the chemical rinse bath or in the annealing drum.&nbsp; None of the existing theories explain the full range of variation seen in such errors, but the Mint hasn&#039;t been helpful in clearing up the nature of these types of errors.[/QUOTE]</p><p><br /></p>

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