20¢ Explorer II
Issue Date: March 31, 1983
City: Albuquerque, NM
Printed By: Bureau of Engraving and Printing
Printing Method: Photogravure
Celebrating the 200th anniversary of the first balloon flight, this set of four was released in both Albuquerque, New Mexico, and Washington, D.C. The balloons pictured are the "Intrepid," used by the Union Army during the Civil War, modern hot air balloons, and the "Explorer II," used by the National Geographic Society and the U.S. Army.