1988 U.S. Spring Charity Seals
88-S1x, 1987 U.S. Spring TB Charity Seals Sheet
1988 ALA U.S. Charity Seals
1988 U.S. Christmas Seals
1988 U.S. Christmas Seals
1988 U.S. Spring Charity Seals
1988 U.S. Spring Charity Seals