Viser nu USA - Luftpostfrimærker (1920 - 1929) - 3 frimærker.
15. august VM: Ingen Perforeringer: 11
![[Airplane Radiator and Wooden Propeller, type B]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/B-s.jpg)
17. august VM: Ingen Perforeringer: 11
![[Air service Emblem, type C]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/C-s.jpg)
21. august VM: Ingen Perforeringer: 11
![[De Havilland Biplane, type D]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/D-s.jpg)
