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I've inspected such a machine thoroughly on one occasion and was able to determine that the machine switched the penny for a dummy before performing the flatten

by McElroy 11y ago

I've inspected such a machine thoroughly on one occasion and was able to determine that the machine switched the penny for a dummy before performing the flatten and stamp operation.

beardicus 11y ago
Perhaps that particular machine did (I suspect you're mistaken though), but that is not the norm. Mutilating coins is not illegal in the United States.