This is a rare and valuable item for collectors of historical event stamps. The 2013 Inverted Jenny stamp sheet is a must-have for stamp enthusiasts who appreciate the unique design and impeccable quality of this item. It originates from the United States, has never been hinged, and is in mint condition.The sheet is ungraded and uncertified, but its quality speaks for itself. It features the iconic image of the Jenny biplane flying upside down, which was a mistake made in the 1918 print run that has since become a celebrated part of stamp collecting history. This item is a great addition to any stamp collection and is highly sought after.