This rare and unique USA Airmail Atlas Sky Merchant 100 Days World Flight With 30 Cancels 1948s s421 stamp is a must-have for any aviation and stamp collector. With its authenticity and origin from the United States, this single stamp features a beautiful motif that captures the essence of aviation history. Placing this stamp in your collection is a great addition to your other United States stamps and United States collection. It's a great conversation piece and a valuable item for any stamp collector. Don't miss out on this opportunity to own a piece of aviation history.