Message:

<p>[QUOTE=&quot;desertgem, post: 1802006, member: 15199&quot;]A vibration is not just one movement, it is a series of movements or an oscillation. A single machine doubling would very rarely have such movement, although it would be more likely in coins from single squeezed dies I suspect. Your term has no association with MDD, and increases confusion on the subject, evidently just so the abbreviations can be used. IMO.[/QUOTE]</p><p><br /></p>

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