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To add, at least as I understand it, a MAD (mis-aligned die) is 'off center' on one side. An off center is off centered on both sides.
With a MAD, the hammer die did not strike directly over the anvil die but the anvil die is centered (because the planchet is in the collar and the collar is centered.
With an off center, the planchet is not centered between the dies -- either because it isn't collared or because the collar failed to center. And I'm not sure how the collar could fail to be centered. It seems like I read somewhere that the collar is thick enough that the anvil die is inside one end of the collar. Anyone with knowledge to clarify?
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Alright, don't y'all come no closer.
I'm warnin' ya, I got a little knowledge and I ain't afraid to use it.
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