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<p>[QUOTE=&quot;Michael K, post: 4203400, member: 78298&quot;]Actually this is not as likely, because of the size of the coins.</p><p>It&#039;s easy for a penny planchet to be stuck in some part of a machine. And even years later, during a &quot;clean&quot; it is discovered and just tossed into a bin of zinc planchets, since at that stage without weighing, they look the same.</p><p>The half dollar is much larger and heavier and less likely for this scenario to happen after so many years have passed. As I said, it is more likely to have happened in the transition year of 1965 when they moved from 90% to 40% than to happen 6 years later. Sure it&#039;s possible. But it is not likely, nor is it as likely as a&nbsp; later copper cent being discovered.[/QUOTE]</p><p><br /></p>

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