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<p>[QUOTE=&quot;desertgem, post: 1793413, member: 15199&quot;]If there is any coin composition with the best chance to make a pattern as it corrodes, the CuNi&nbsp; alloy is it. Remember that&nbsp; CuNi&nbsp; is the only coin metal that Nic-a-date and such work on , as the crystallization pattern is different with the raised devices such as the date and lettering, than the fields which are more reactive to the chemical all due to difference in localized striking pressure. I think Rascal had the best answer, corrosion and possible burial.[/QUOTE]</p><p><br /></p>

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