This is a beautiful sheet of 20 stamps, issued by the United States in 1993. It celebrates the opening of the National Postal Museum and depicts founding father Benjamin Franklin, printing press, mail rider, Independence Hall, Civil War soldier, concord stagecoach, Pony Express rider, Charles Lindbergh, railway mail car, Model A mail truck, Jenny bi-plane, stamps on stamp, postmark and barcode. It is Scott catalog #2779-82, and is mint never hinged.