The obverse on these shows Liberty incused on the shield as opposed to raised as on the regular die. These were also struck as follows: Silver J1407/P1550 with slightly more than a dozen known. Copper J1408/P1551 with fewer than a dozen known. Aluminum J1409/P1552 with only one confirmed example. Nickel J1410/P1553 with only 3 or 4 known. Photo courtesy of Heritage.