1981 15¢ Whitney Moore Young Mint Sheet of 50 Stamps

United States #1875 15¢ Whitney Moore Young Mint Single

United States #1874 15¢ Everett Dirksen Mint Sheet of 50 Stamps Mint Condition, never hinged.

United States #1858 18¢ George Mason Mint Sheet of 50 Stamps Mint condition, never hinged.

United States #1890 18¢ "Waves of Grain" Mint Sheet of 50 Stamps Mint condition, never hinged.

United States #1921-24 18¢ Wildlife Habitats Mint Sheet of 50 Includes: #1921 - Blue Heron "Save Wetland Habitats" (10x) #1922 - Badger "Save Grassland Habitats" (10x) #1923 - Grizzly Bear "Save...