This is a hub trial, in copper, of Longacre's obverse similar to the one used on J561-J564/P622-P625 and J565/P626. On this example, the letters are irregularly spaced with the C and A in America spaced apart. It is ex Lohr, Polis-Bowers and Merena 6/91 and is the illustrated example.
Another, also struck in copper, with the C and A spaced closer together exists JA1867-9/P3311 and is ex Werner 1/55, Auction 89, Dr A. Roter, Downey.
Photo is a scan from the Bowers and Merena 6/91 sale catalog.