These were issued in sets along with a 3 cent and 5 cent piece. To view the set, click here. Pollock described both a high date and centered date for these at least in nickel J608/P673 which is fairly common. About 8-10 are known in copper J609/P674 with the illustrated example showing the high date. To see images of all of these, click here. An incomplete reverse die trial, JA1868-1/P3341 is also known.