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<p>[QUOTE=&quot;Doug21, post: 1552285, member: 5650&quot;]I&#039;d think these transitional metal errors probably exist wherever possible.</p><p><br /></p><p>&nbsp;I don&#039;t think Mint workers would really care about a planchet or two left in whatever containers they use, it&#039;s probably SOP to not worry about it , as the Mint is really a factory making widgets, but they are coins to us.</p><p><br /></p><p>Maybe not a 1983 copper cent , since the containers should have had lots of use making 82 Zincolns. </p><p><br /></p><p>I could certainly see a few 90% silver 1965 Kennedy halves being minted and never discovered and melted in 1980 or so. That coin would be tough to spot and bother to weigh to check it out.&nbsp; Maybe some are known ?</p><p><br /></p><p>I know they tweaked the lincoln cent composition a bit a few times, like with the shell casing alloy....I can see a few of those being the wrong year and never found.</p><p><br /></p><p>I suspect there might be 1864 IHC&quot;s struck on the C/N planchet and on and on.</p><p><br /></p><p>Many of these errors probably go undiscovered ?[/QUOTE]</p><p><br /></p>

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