1991 40¢ Air Post - William Piper Mint Single

United States #C129 40¢ Air Post - Aviation Pioneer William Piper Mint Sheet of 50 Mint condition, never hinged.

United States #C128 50¢ Air Post - Harriet Quimby, Pioneer Pilot Mint Single Mint condition, never hinged.

United States #2538 29¢ William Saroyan Mint Single

United States #C130 50¢ Air Post - Antarctic Treaty 30th Anniversary Mint Single Mint condition, never hinged.

United States #C131 50¢ Air Post - Americas Issue (Bering Strait) Mint Single Mint condition, never hinged.