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<p>[QUOTE=&quot;Michael K, post: 3173727, member: 78298&quot;]Yes a copper 1983-D. Also a 1989-D and a few others.</p><p>But my feeling is these are isolated incidents. A copper blank is found years later stuck in a machine in a weird place during a clean, you don&#039;t take anything out of the mint, so it just gets tossed into a bin of zinc blanks.</p><p>If an entire sheet/roll of copper planchets got mixed in by accident, there would be (40?) of these coins instead of 1. How many blanks can you punch out of a sheet? The later years are more interesting that the 1983 which was a transitional year. 1989? How did that go undiscovered for 7 years? (The copper blank at the mint.)[/QUOTE]</p><p><br /></p>

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