Sedaj prikazano: Združene države - Poštne znamke (1920 - 1929) - 3 znamke.
1928
Aeronautics Conference Issue
12. december WM: Nič Perforacija: 11
![[Aeronautics Conference Issue, tip GK]](https://swmedia-4cd6.kxcdn.com/media/market/1226/7420196-s.jpg)
1928
Aeronautics Conference Issue
12. december WM: Nič Perforacija: 11
![[Aeronautics Conference Issue, tip GK]](https://swmedia-4cd6.kxcdn.com/media/market/1226/9907810-s.jpg)