Although these are described as regular die trial pieces in the standard references, the off-metal 'trials' of this year were deliberately struck for sale to collectors.
They were struck in the following combinations:
Copper J1151/P1293 with fewer than a half dozen known.
Aluminum J1152/P1294 with only 2 confirmed examples.
Nickel J1153/P1295 with only the Woodin-1914 ANS exhibit, Newcomer, Farouk, Superior 5/90, Superior 10/90, Share-ANR 9/03, southern collection, Simpson example known.
Photo courtesy of Stacks-Bowers.