Visar nu: USA - Flygpostsfrimärken (1918 - 2012) - 4 frimärken.
1930
Winged Globe
10. februari WM: Inga Perforering: 11
![[Winged Globe, Typ H]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/H-s.jpg)
1930
Graf Zeppelin Issue
19. april WM: Inga Perforering: 11
![[Graf Zeppelin Issue, Typ I]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/I-s.jpg)
![[Graf Zeppelin Issue, Typ J]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/J-s.jpg)
![[Graf Zeppelin Issue, Typ K]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/K-s.jpg)
