Viser nu USA - Luftpostfrimærker (1930 - 1939) - 4 frimærker.
1930
Winged Globe
10. februar VM: Ingen Perforeringer: 11
![[Winged Globe, type H]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/H-s.jpg)
1930
Graf Zeppelin Issue
19. april VM: Ingen Perforeringer: 11
![[Graf Zeppelin Issue, type I]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/I-s.jpg)
![[Graf Zeppelin Issue, type J]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/J-s.jpg)
![[Graf Zeppelin Issue, type K]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/K-s.jpg)
