Used First Day Covers

100th Anniversary of the Birth of George W. Norris Block of Stamps First Day Cover

Commemorating 50th Anniversary Naval Aviation, 1911-1961 First Day Cover

Commemorating 50th Anniversary Naval Aviation Block of Stamps First Day Cover

Commemorating the 50th Anniversary of the First Workmen&#039;s Compensation Law in the United States First Day Cover

Commemorating the 50th Anniversary of the First Workmen&#039;s Compensation Laws in United States Block of Stamps First Day Cover

100th Anniversary of Frederic Remington First Day Cover

100th Anniversary of Frederic Remington Block of Stamps First Day Cover

50th Anniversary the Republic of China 1911-1961 First Day Cover

50th Anniversary of the Revolution Block of Stamps First Day Cover

Honoring Basketball and Its Inventor Dr. James Naismith First Day Cover

Honoring Basketball and it&#039;s inventor, Dr. James Naismith Block of Stamps First Day Cover

John J. Pershing American Military Leader 1860-1948 8¢ Regular Postage Series of 1961 First Day Cover

John J. Pershing, American Military Leader 1860-1948 8¢ Regular Postage Series of 1961 Block of Stamps First Day Cover

100th Anniversary Nursing Profession First Day Cover

50th Anniversary New Mexico Statehood 1912-1962 First Day Cover

50th Anniversary Arizona Statehood 1912-1962 First Day Cover

Project Mercury First Day Cover

Project Mercury First Day Cover

4¢ Project Mercury First Day Cover

4¢ Project Mercury First Day Cover

4¢ Project Mercury on plain envelope First Day Cover

4c Project Mercury First Day Cover

Project Mercury 4c First Day Cover

After 5 days return to Peoria, Illinois Block of Stamps First Day Cover