It's a peculiar, but rather common form of die fatigue (die deterioration) that mainly affects copper-plated zinc cents. It can occur on the obverse, the reverse, or both faces at once. I've seen quite a few examples as severe, or more severe than this.
If you go through any large pile of zinc cents, you're sure to find a few examples.
Mike Diamond is an error coin writer and researcher. Views expressed here do not necessarily reflect those held by any organization I am a member of.
Comments
If you go through any large pile of zinc cents, you're sure to find a few examples.
Specializing in 1854 and 1855 large FE patterns
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Lane
See http://www.doubledimes.com for a free online reference for US twenty-cent pieces
rainbowroosie April 1, 2003