Images courtesy of John
In 1992, Wright knew of "At least three, likely four or five
Proofs...all one-sided (Proof obv / MS rev)."
The obverse die of this
variety was also used on 1831 Newcomb
The reverse die of this
variety was also used on 1831 Newcomb 7.
Sources and/or recommended
Cent Book 1816-1839" by John D. Wright
Complete Encyclopedia Of U.S. And Colonial Coins" by Walter Breen
Early American Coppers Club