Muri Bhalissa: L-Istati Uniti - Bolol tal-posta ta' l-ajru (1918 - 2012) - 2 bolol.
1967
The 100th Anniversary of the Alaska Purchase
30. March WM: Xejn Perforazzjoni: 11
![[The 100th Anniversary of the Alaska Purchase, Tip AT]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/AT-s.jpg)
1967
Birds - Columbia Jays by John James Audubon
26. April WM: Xejn Perforazzjoni: 11
![[Birds - Columbia Jays by John James Audubon, Tip AU]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/AU-s.jpg)
