I just found this piece of information regarding the variety:
"There are also some very rare lightweight counterfeit New Jersey coppers, as Maris 79-ee, 80-ff, 81-ll, 83-ii and 84-kk (no more that 3 or 4 examples of any of these varieties survive) along with a more common counterfeit copper called the "Serpent Head" variety, Maris 54-k (an R3, with 151-250 examples surviving). The "Serpent Head," which was the only mass produced counterfeit, was attributed by generations of numismatists to a man named Hatfield."
Sweet!