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<p>[QUOTE=&quot;-jeffB, post: 3882469, member: 27832&quot;]If it were missing the clad layers, it would also be <i>thinner</i>, and the details on both sides would be weaker.</p><p><br /></p><p>When a cupronickel coin is exposed to acid, the nickel dissolves faster than the copper, and what&#039;s left looks darker -- it&#039;s more copper and less nickel, and the copper darkens further as it oxidizes. The result is a coin that looks just like yours.[/QUOTE]</p><p><br /></p>

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