White First Day Covers

Prominent American Series First Day Cover

George Washington Block of Stamps First Day Cover

150th Anniversary Mississippi Statehood 1817-1967 First Day Cover

Franklin D. Roosevelt 6¢ Coil Stamp - Prominent Americans Series First Day Cover

10c Air Mail Stamp Series of 1968 First Day Cover

10 Cent Air Mail Stamp, Series of 1968 First Day Cover

10¢ Air Mail Stamp Series of 1968 - Air Mail&#039;s Golden Anniversary Year Block of Stamps First Day Cover

10¢ Air Mail Booklet Pane 1968 First Day Cover

1c Thomas Jefferson Coil Stamps Block of Stamps First Day Cover

1¢ Thomas Jefferson Prominent Americans Series First Day Cover

6c American Flag Series of 1968 First Day Cover

American Flag 6¢ Series of 1968 Block of Stamps First Day Cover

Thomas Paine 1737-1809 - Prominent Americans Series First Day Cover

150th Anniversary Illinois Statehood, Land of Lincoln First Day Cover

Franklin D. Roosevelt First Day Cover

Oliver Wendell Holmes First Day Cover

International Exposition HemisFair &#039;68 San Antonio, Texas First Day Cover

PAL Airlift Military Parcel Stamp 1968 First Day Cover

PAL Airlift Military Parcel Stamp 1968 Block of Stamps First Day Cover

Centennial of the Benevolent and Protective Order of Elks 1868-1968 First Day Cover

Centennial of the Benevolent and Protective Order of Elks 1868-1968 Block of Stamps First Day Cover

Golden Anniversary US Airmail Service 1918-1968 First Day Cover

Golden Anniversary United States Mail Service, 1918-1968 Block of Stamps First Day Cover

Saluting the Guardians of Law and Order First Day Cover