This set of stamps from the United States features a range of denominations including 6, 8, 16, and 24. They were issued between 1918 and 1923 and are a great addition to any aviation-themed collection. The stamps are hand-stamped and ungraded, with a multi-color design that is sure to catch the eye of any collector. These stamps were used for air mail and are a piece of history from the United States. They are uncertified and come from a range of places within the country. Add these stamps to your collection today and enjoy the unique topic they cover - aviation. The stamps are not hinged they are in holders.