Ora in esposizione: U.S.A. - Francobolli Posta Aerea (1930 - 1939) - 4 francobolli.
1930
Winged Globe
10. Febbraio WM: Nessuno Dentellatura: 11
![[Winged Globe, Scrivi H]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/H-s.jpg)
1930
Graf Zeppelin Issue
19. Aprile WM: Nessuno Dentellatura: 11
![[Graf Zeppelin Issue, Scrivi I]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/I-s.jpg)
![[Graf Zeppelin Issue, Scrivi J]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/J-s.jpg)
![[Graf Zeppelin Issue, Scrivi K]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/K-s.jpg)
