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<p>[QUOTE=&quot;Oldhoopster, post: 3695143, member: 84179&quot;]You should take a look at <a href="http://www.doubleddie.com/" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.doubleddie.com/" rel="nofollow">WWW.doubleddie.com</a>.&nbsp; There is a tab marked Worthless Doubling.&nbsp; It explains Die Deterioration Doubling as well as machine doubling (MD).&nbsp; If you are interested in Doubled Die errors, I strongly recommend learning as much about the minting and die making process as possible.&nbsp; The more you know, the less time you’ll spend chasing things like DDD and MD.&nbsp; Many members on CT are very knowledgeable on this topic and be helpful.</p><p><br /></p><p>Also, while it’s interesting to look at coins under high magnification (I would occasionally sneak one into the SEM when I was in grad school), there is very little interest in errors that are not visible at 5-10X.&nbsp; At high mags, finding things becomes more of an academic exercise and very few in the hobby are interested, so these Micro doubled dies rarely bring much of a premium.[/QUOTE]</p><p><br /></p>

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