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Message:: [QUOTE="tomfiggy, post: 2269355, member: 51884"]Unlike die deterioration doubling, which is just extreme wear. A doubled die implies moving of the die as it is being hubbed. In the older era it took more than one squeeze in the hubbing press to fully imprint the working die. The working die needed to be annealed (heated) to soften it between pressings. When it was re inserted if it moved in any direction, or if the die was tilted, twisted, whatever. There are 9 different types of movement that are considered a doubled die.  In modern hubbing there is supposed to be only a single squeeze. I have read about the possibility of the press operator stopping the press mid hubbing for some reason and creating a doubled hub that way. It is more often now a form of twisting, or play in the chamber. people are still trying to figure it out. A lot of the newer ones are subtle, but so were a lot of older ones doubled eyelids anyone? There is always a pattern of the motion on the doubled die coin. I think my 2011 is right up there with some of the 1972 dies as far as the beauty of the notching, thickening and doubling of the digits and letters. Of course I'm looking for the "big one", aren't we all? In 40 years that 2011 will be one of the the "big one"s. I don't find what I'm looking for usually. I'm often surprised and delighted with what I do find.I just found this 1984D last night. I wasn't expecting that.[ATTACH=full]451931[/ATTACH][/QUOTE]