Now showing: United States - Airmail stamps (1918 - 2012) - 4 stamps.
13. February WM: None Perforation: 11
![[Aviation Pioneers - Alfred V. Verville, type CH]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/CH-s.jpg)
13. February WM: None Perforation: 11
![[Aviation Pioneers - Lawrence and Elmer Sperry, type CI]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/CI-s.jpg)
15. February WM: None Perforation: 11
![[Transpacific Airmail, type CJ]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/CJ-s.jpg)
22. August WM: None Perforation: 11
![[Junipero Serra, type CK]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/CK-s.jpg)
Now showing: United States - Airmail stamps (1918 - 2012) - 4 stamps.
13. February WM: None Perforation: 11
13. February WM: None Perforation: 11
15. February WM: None Perforation: 11
22. August WM: None Perforation: 11