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Message:: [QUOTE="jazzcoins, post: 506331, member: 15709"],The differance between hub doublinng ,and longacre doubling ,machine doubling ,and die deterioration doubling to me  When i see hub doubling it has raised images ,split serifs in the letters ,and the images are rounded  which are distinct and clear  When i see longacre doubling usually it is doubled on both sides of the coin whuch i stated in a previous thread with a mushy scattered somewhat raised apearance ,but not particularly rounded the two different doubling is really easy to detect on the older coins if you use good judement.    When I see machine doubling I look for the shelf like appearance flat not rounded or raised and usually has splits in the letters from the loose dies striking down on the coin with force damaging the metal.  When i see die dterioration doubling I look for mushy letters and usually doubling on both sides of the coin and the images are raised , but are not clear and distinct images  .I also look at the fields of the coin to see a orange peel effect a clear indication of DDD. These are my ways to detect different forms of doubling and this method has worked for me 99 percent of the time. Jazzcoins Joe[/QUOTE]