Although described as regular dies trial pieces, these were actually deliberately struck for sale to collectors as part of complete off-metal sets.
Examples were struck as follows:
Copper J1161/P1303 with about a half dozen known.
Aluminum J1162/P1304 with fewer than 3 examples confirmed.
Nickel J1163/P1305 with only the Woodin-1914 ANS exhibit, Farouk, Stacks 6/10, Simpson collection exmaple known.
Photo courtesy of American Numismatic Rarities.