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<p>[QUOTE=&quot;desertgem, post: 576382, member: 15199&quot;]Machine ( strike, etc) doubling occurs because a die is not secured in the press and moves during the striking process. The die itself is not doubled, but as the strike occurs, the movement causes a &quot;smearing&quot; of parts of the image on the coin. Each of these coins resulting may appear different because the movement itself could be more or less each time. Like this one of mine where the die looks like it moved twice during the process, and the same of yours. If you look at the nine in your coins date, you will see it is flattened also.</p><p><br /></p><p><img src="http://i455.photobucket.com/albums/qq279/desertgem/1970lincoln-2-1.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>In a true doubled die, the doubling is produced by 2 or more impressions being offset from the other as the die is produced from the hub. The the coins struck from this die would have a doubling that would be the same for resulting coins. Notice on this 1955 double die how the images are the same depth and there is no flattening. </p><p><br /></p><p><img src="http://i455.photobucket.com/albums/qq279/desertgem/55dd0date-1.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>Here is a good site that explains the differing causes of (Apparent) or True doubling.</p><p><a href="http://koinpro.tripod.com/Articles/OtherFormsOfDoubling.htm" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://koinpro.tripod.com/Articles/OtherFormsOfDoubling.htm" rel="nofollow">http://koinpro.tripod.com/Articles/OtherFormsOfDoubling.htm</a></p><p><br /></p><p>And here is the url on a 1969-S DDO</p><p><a href="http://koinpro.tripod.com/Articles/1969S1cDDFound.htm" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://koinpro.tripod.com/Articles/1969S1cDDFound.htm" rel="nofollow">http://koinpro.tripod.com/Articles/1969S1cDDFound.htm</a></p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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