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<p>[QUOTE=&quot;Marshall, post: 3207631, member: 21705&quot;]I&#039;ll let the real experts clarify this.</p><p><br /></p><p>I have always just considered CUDS to be a place where the die has sunk (leaving an elevated area on the coin.) They usually occur along die cracks, but I consider them to be more than mere die cracks.</p><p><br /></p><p>If this is accurate, then die chips and cracks could be considered a subset of CUDs, but I usually associate CUDS with a sinking of an area between cracks and some other crack or design limiter such as a letter or the edge of the coin.</p><p><br /></p><p>As for retained CUDS, I have no clue. They are either there or they are not. I&#039;m sure someone has determined there is something different between an unretained CUD and a retained one. But I don&#039;t know what it is.[/QUOTE]</p><p><br /></p>

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