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<p>[QUOTE=&quot;Clawcoins, post: 3213433, member: 77814&quot;]With true Doubled Die (or DDO [DD Obverse], DDR [DD Reverse]) Think of the letters being stamped Twice on the Die.&nbsp; And thus the Die itself has two of the letters with some portion of overlapping.</p><p><br /></p><p>From some of the reading I was doing the outer letters, and dates are stamped separately from the rest of the side.&nbsp; Thus the reason only certain things, and not necessarily all of the face is doubled.&nbsp; Though I don&#039;t know about those in complete detail.</p><p><br /></p><p>Versus the dies&#039; Letter/Number detailed edges being worn down.</p><p>notice the thickness of the regular L.&nbsp; As the die is worn down, the edges loose their detail and creates a shelf like pattern.&nbsp; A thinner L, and thickness may increase though creates a shelf pattern with the Machine Doubling example.</p><p><br /></p><p>[ATTACH=full]835098[/ATTACH]</p><p><br /></p><p><br /></p><p>This 1969 S DD Cent shows obvious Doubled Die. See the separation of the letters</p><p><br /></p><p>Think of the&nbsp; Letters and Numbers as a inverse die being stamped offset of where it should be.&nbsp; The &quot;Y&quot; in liberty isn&#039;t as offset as the &quot;L&quot; in Liberty thus showing the rotation of the master die to the working die.</p><p><br /></p><p>Thus the reason the 1 9 6 and 9 show less doubling with the 1, and more as you get to the last 9. It&#039;s rotated slightly with the outer letters showing more rotation due to being further from the center.</p><p><img src="http://images.pcgs.com/CoinFacts/2923_37655933_2200.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p><br /></p><p>Versus Shelf Like &quot;doubling&quot; or mechanical doubling or die deterioration doubling.</p><p><img src="http://www.lincolncentresource.com/sitebuilder/images/machine_doubling_13-323x239.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p><br /></p><p><br /></p><p>more information =&gt; <a href="https://www.ngccoin.com/news/article/5688/Double-Dies-vs-Machine-Doubling/" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.ngccoin.com/news/article/5688/Double-Dies-vs-Machine-Doubling/" rel="nofollow">https://www.ngccoin.com/news/article/5688/Double-Dies-vs-Machine-Doubling/</a></p><p><br /></p><p><br /></p><p>hope that&#039;s close to correct info for Fred.</p><p><br /></p><p>You can create your own &quot;test dies&quot; by using Silly Putty.&nbsp; use a small strip of it on the letters, peel off and put back on slightly off center and create a doubled image of the letters.</p><p><br /></p><p>Also, in 1996 they started using the &quot;single squeeze&quot; die making which creates a different type of double die errors which I haven&#039;t really figured out yet.[/QUOTE]</p><p><br /></p>

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