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. 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. The illustrated example is the former The G.H. Wolfe coin and is courtesy of Heritage.