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<p>[QUOTE=&quot;-jeffB, post: 1580145, member: 27832&quot;]Remember, acid etching tends to preserve and even enhance detail -- that&#039;s why we have &quot;acid dated&quot; Buffalo nickels.</p><p><br /></p><p>Sure, nickel is more reactive than copper. But things get complex when you&#039;re dealing with alloys, and metals react differently to different acids (look up &quot;passivation&quot;).</p><p><br /></p><p>It&#039;s an acid-etched coin.[/QUOTE]</p><p><br /></p>

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