Zobrazujú sa: Spojené štáty - letecká pošta - známky (1918 - 2012) - 3 známky.
15. august WM: nikto Perforácia: 11
![[Airplane Radiator and Wooden Propeller, typ B]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/B-s.jpg)
17. august WM: nikto Perforácia: 11
![[Air service Emblem, typ C]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/C-s.jpg)
21. august WM: nikto Perforácia: 11
![[De Havilland Biplane, typ D]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/D-s.jpg)
