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<p>[QUOTE=&quot;Bill in Burl, post: 26397713, member: 23692&quot;]Machine or mechanical doubling (MD) is caused when the die gets a little loose in the holder.&nbsp; All coins struck by this &quot;loose&quot; die will look the same or will further progress as the die gets looser.&nbsp; The die actually strikes the coin squarely, but the coin slightly moves/rotates as the die lifts off the planchet, causing a shadow or shelved impression.&nbsp; Once the floor worked tightens the die in the holder, then everything is OK.&nbsp; I&#039;m speaking about older coin/die set-ups, not modern ones.[/QUOTE]</p><p><br /></p>

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