Muri Bhalissa: L-Istati Uniti - Bolol tal-posta ta' l-ajru (1920 - 1929) - 3 bolol.
15. August WM: Xejn Perforazzjoni: 11
![[Airplane Radiator and Wooden Propeller, Tip B]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/B-s.jpg)
17. August WM: Xejn Perforazzjoni: 11
![[Air service Emblem, Tip C]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/C-s.jpg)
21. August WM: Xejn Perforazzjoni: 11
![[De Havilland Biplane, Tip D]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/D-s.jpg)
