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<p>[QUOTE=&quot;Markus1959, post: 2063312, member: 73174&quot;]I guess - but 30 years ago the average Joe in his garage shop with grinders and sand paper would tear a copper coin to smitherines or at least leave evidence of doing &quot;something fishy&quot; not leaving a smooth surface. Unless left in acidic solution to smooth down the tooling marks - but then wouldn&#039;t it also smooth down other features and leave a pitted surface?[/QUOTE]</p><p><br /></p>

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