H.E. Harris

United States #C47 6¢ Air Post - Powered Flight Mint Plate Block

United States #C46 80¢ Air Post - Diamond Head, Hawaii Mint Plate Block

United States #C45 6¢ Air Post - Wright Brothers Mint Plate Block

United States #C44 25¢ Air Post - Plane & Globe Mint Plate Block

United States #C42 10¢ Air Post - Post Office 150th Anniversary Mint Plate Block

United States #C40 6¢ Air Post - Alexandria, Virginia Mint Plate Block

United States #C31 50¢ Air Post - Transport Plane (Orange) Mint Plate Block

United States #C39 6¢ Air Post - DC-4 Skymaster (as C33) Mint Plate Block

United States #C38 5¢ Air Post - New York Jubilee Mint Plate Block

United States #C36 25¢ Air Post - Plane Over Bridge Mint Plate Block

United States #C35 15¢ Air Post - New York Skyline Mint Plate Block

United States #C33 5¢ Air Post - DC-4 Skymaster Mint Plate Block