Zobrazujú sa: Spojené štáty - letecká pošta - známky (1918 - 2012) - 4 známky.
1930
Winged Globe
10. február WM: nikto Perforácia: 11
![[Winged Globe, typ H]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/H-s.jpg)
1930
Graf Zeppelin Issue
19. apríl WM: nikto Perforácia: 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)
