Amerika Syarikat
Ditunjukkan sekarang: Amerika Syarikat - Setem-setem mel udara (1918 - 2012) - 1 Setem-setem.
1968
The 50th Anniversay of Regularly Scheduled U.S. Airmail Service
15. May WM: Tiada Perforasi: 11
![[The 50th Anniversay of Regularly Scheduled U.S. Airmail Service, jenis AW]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/AW-s.jpg)
