This 1971 US Air Mail USA 21c stamp is a rare find for collectors. The stamp features a vibrant multi-colored design with an aviation theme, perfect for those interested in the history of flight. It has been certified as genuine and was issued in the 1970s in the United States. The stamp is in good quality, having been previously used and is denominated at 21 cents. It is a great addition to any stamp collection and comes from a trusted seller, Heads Up! Coins and More. Don't miss the opportunity to own a piece of aviation history with this unique and beautiful stamp.