Human error... at least it is to assume this is an "error" coin. I know of no damage like this that would take place before coins leave the mint. I suspect it was struck or heated during circulation.
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I have this 1982 Washington quarter with a large protrusion on the obverse and reverse. Any idea what kind of error this is?
M
Marc's Expert Appraisal
ANA Life Member · Hudson Valley Numismatics
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