USA
Visar nu: USA - Flygpostsfrimärken (1918 - 2012) - 1 frimärken.
1988
Avaition Pioneers - Igor Sikorsky, 1889-1972
23. juni WM: Inga Design: R. Wicks. Gravyr: D. Brown, G. Chaconas, G. Slaught Perforering: 11
![[Avaition Pioneers - Igor Sikorsky, 1889-1972, Typ CN]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/CN-s.jpg)
