This design is believed by some researchers to be a fantasy piece struck in 1858 or later for sale to collectors as the reverse die used is not believed to have been created in 1856.
Examples were struck as follows:
Copper-nickel J184/P220 with over a dozen believed to exist.
Copper J185/P221 with at least the following 6 known. This includes corrections to the pedigrees in Pollock. To see images of all of these, click here.