The regular dies trial piece. These appear to have been struck from business strike dies which is not unusual for pre-1863 coinage.
Examples were struck as follows:
Copper J187/P223 with at least 3 known including one the illustrated example above from Heritage 1/15 FUN - PCGS63BN, the Kagin's 3/17 and the one below which was given to the Smithsonian. The genuineness of this latter piece has been questioned.
Photo courtesy of the National Numismatic Collection of the Smithsonian institution.
Nickel or German Silver J187A/P224 with only 2 or 3 believed to exist including the piece illustrated below ex Stack's 6/77, Ivy 8/80, Stack's 1/87, Heritage 1/2007, Heritage 8/2009.
Photo courtesy of Heritage.