USA
Visar nu: USA - Flygpostsfrimärken (1918 - 2012) - 1 frimärken.
1988
Avaition Pioneers - Samuel Pierpont Langley, 1834-1906
14. maj WM: Inga Design: K. Dallison. Gravyr: Bureau of Engraving & Printing. Perforering: 11
![[Avaition Pioneers - Samuel Pierpont Langley, 1834-1906, Typ CM]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/CM-s.jpg)
