Muri Bhalissa: L-Istati Uniti - Bolol tal-posta ta' l-ajru (1930 - 1939) - 4 bolol.
1930
Winged Globe
10. February WM: Xejn Perforazzjoni: 11
![[Winged Globe, Tip H]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/H-s.jpg)
1930
Graf Zeppelin Issue
19. April WM: Xejn Perforazzjoni: 11
![[Graf Zeppelin Issue, Tip I]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/I-s.jpg)
![[Graf Zeppelin Issue, Tip J]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/J-s.jpg)
![[Graf Zeppelin Issue, Tip K]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/K-s.jpg)
