HUGE larger than a quarter reverse cap die (slightly cupped on reverse.) Struck mulitple times and each strike rotated a bit until the last strike has rotated over 90 degrees. Most obvious on reverse. See pic of reverse where first strike AMERICA can be seen above final strike of UNITED. Really COOL! Also see pic of date where there appears to be at least 4 loops beyond last digit of date. BU but mostly dark gray since so much zinc visible. Size of 25c. See pic for comparison of 25c and 1c.