Photo courtesy of Heritage. Examples were struck as follows: Nickel J1050/P1184 with 2 dozen or more known. Copper J1051/P1185 with 2 dozen or more known. Aluminum J1052/P1186 with less than a dozen known. To see available images of these, click here. Aluminum on wide planchet J1052/P1187 and is the Mitchelson, Connecticut State Library example.