Although described as a regular dies trial piece, these were actually deliberately struck for sale to collectors as part of complete off-metal sets.
Examples were only struck in copper J1414/P1557 with only 2 confirmed as follows:
1) Crouch-Superior 6/77, Bowers and Merena 9/94 - PCGS64BN
2) Farouk ?, Bowers and Ruddy 9/75, 95 ANA, I&L Goldberg 5/06 - PCGS62RB, illustrated above.
Photo courtesy of Ira & Larry Goldberg Coins & Collectibles.