Color postcard with a picture of a 20c U. S. postage stamp with a photograph of hot air balloons Caption on front: Nonexclusive license of the United States Postal Service Hot air ballooning Stamp design 1982 United States Postal Service Caption on back: HOT AIR BALLOONS Celebrating in a festival of colors hot air ballooning marks a course in history, scientific exploration, military applications as well as man's age old desire to soar with birds. The series of four stamps were issued March 31, 1983. Commemorative Puzzle Series Scott #2033 Patent Pending Greenleaf Steel Rule Die Corp., Box 217, Schenevus, NY 12155-0217 Est. 1947 Sent on: June 30, 1991