Сега показвам: Съединените Щати - Въздушна поща марки (1930 - 1939) - 4 марки.
1930
Winged Globe
10. Февруари воден знак: Никой Пробиване: 11
![[Winged Globe, тип H]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/H-s.jpg)
1930
Graf Zeppelin Issue
19. Април воден знак: Никой Пробиване: 11
![[Graf Zeppelin Issue, тип I]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/I-s.jpg)
![[Graf Zeppelin Issue, тип J]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/J-s.jpg)
![[Graf Zeppelin Issue, тип K]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/K-s.jpg)
