10¢ Lexington & Concord - Pack of 25 unused stamps from 1975
13¢ Skilled Hands for Independence - Pack of 25 unused stamps from 1977
13¢ Skilled Hands for Independence - 25 unused stamps from 1977
15¢ American Trees - Pack of 25 unused stamps from 1978
8¢ Wildlife Conservation - Pack of 25 unused stamps from 1971
15¢ Endangered Flora - Pack of 25 unused stamps from 1979
15¢ Endangered Flora - 25 unused stamps from 1979
32¢ Iowa Statehood - Pack of 25 unused stamps from 1996
3¢ Iowa Statehood Centennial - Pack of 25 unused stamps from 1946
10¢ Perussis Altarpiece Angel - Pack of 25 unused stamps from 1974
13¢ Declaration of Independence - Pack of 25 unused stamps from 1976
13¢ Early Cancer Detection - Pack of 25 unused stamps from 1978
15¢ Viking Mission to Mars - Pack of 25 unused stamps from 1978
