Although these are described as regular die trial pieces in the standard references, it is more likely that the off-metal 'trials' of this year were deliberately struck for sale to collectors. Examples were struck as follows: Copper J718/P799 with about a half dozen known. Aluminum J719/P800 with about a half dozen known. Nickel J720/P801 with about 3 or 4 known. Photo courtesy of Bowers and Merena.