6¢ Grand Canyon - John Wesley Powell - Pack of 25 unused stamps from 1969
25¢ Ernest Hemingway - Pack of 25 unused stamps from 1989
32¢ Richard Nixon - Pack of 25 unused stamps from 1995
20¢ Smokey the Bear - Pack of 25 unused stamps from 1984
32¢ Georgia O'Keeffe - Pack of 25 unused stamps from 1996
