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<p>[QUOTE=&quot;Oldhoopster, post: 3976996, member: 84179&quot;][USER=95730]@jayden[/USER] </p><p><br /></p><p>Notice how the “doubled” area is flat and shelf-like.&nbsp; That’s a key characteristic of machine doubling (also called mechanical or strike doubling).&nbsp; True hub doubling will have a rounded appearance similar to the normal letters.&nbsp; Also, if you look at the O in ONE, it’s thinner than normal.&nbsp; This never happens with true hub doubling.</p><p><br /></p><p><br /></p><p>MD is common and is not considered an error nor does it add any value.&nbsp; Sometimes it’s difficult for a new collector to distinguish between MD and hub doubling.&nbsp; I recommend going to Wexler’s <a href="http://www.doubleddie.com/" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.doubleddie.com/" rel="nofollow">www.doubleddie.com</a> and click on the tab called “Worthless Doubling”.&nbsp; It has a good explanation of the cause and how to spot it.&nbsp; While you’re there, take some time to look at the pics of actual doubled dies. </p><p><br /></p><p><br /></p><p>It may take some time and study, but the better you become at recognizing worthless doubling the less time you’ll waste on obvious MD coins.</p><p><br /></p><p><br /></p><p>Hope this helps[/QUOTE]</p><p><br /></p>

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