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<p>[QUOTE=&quot;cpm9ball, post: 2622586, member: 24633&quot;]Yes, it was hand-punched into the dies until about 1990, but that doesn&#039;t mean that mechanical doubling can&#039;t occur during striking. You see, during the coining operation, vibration from the machinery can cause the die to loosen in the holder. It is this back-and-forth movement at high speed that causes mechanical doubling.</p><p><br /></p><p>Chris[/QUOTE]</p><p><br /></p>

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