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<p>[QUOTE=&quot;desertgem, post: 2879691, member: 15199&quot;]Be aware in your study that there was a large change in the way dies are made in the 1990s. Before that the classical hubbing as describe in several of the articles you have listed, produced 8 classes of true doubled die coin production. Then when they switched to single squeeze production, theoretically this should have eliminated any doubled die coins. But is this method, the single squeeze could &#039;chatter&#039; during production due to poor design perhaps or problems with the coin press, and this produced a &quot;doubling&quot; of parts of the design. Now in the classical production multiple squeeze die production, this would be called machine doubling damage and no extra value, but for some reason...people and magazines started calling it &quot;doubled die&quot; like the before. So it was added as type 9 doubling. That is why some sources say it is not a doubled die, while others say it is a doubled die. People who deal in coins , and who were afraid perhaps that with no new doubled dies coming along, they would not make as much on coins jumped on the idea that is was valuable and everyone should collect them and pay the price. Classic doubled die collectors like me stop at the 1995 DD on the cent. I do have the 2009 series of &quot;single squeeze&quot; double dies, because they were so many and plentiful, I got boxes containing them for face at the bank. Ebay and others , sellers do not mention the difference, and a large percentage for sale are not DD, wishful thinking by the owners.&nbsp; Good luck ! You can learn a lot by reading old threads also. Jim[/QUOTE]</p><p><br /></p>

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