Upside Down Stamp Plane 2025 Model. In 2013, it released replicas of the stamps, this time with the plane flying upside down on purpose. Only one sheet of 100 was sold with the misprint showing the plane flying upside down, creating stamp collecting’s most famous stamp errors.
Basically, the stamp is affixed upside down. When it comes to philately, there’s one stamp that flies above all others:
