USA
Viser nu USA - Luftpostfrimærker (1918 - 2012) - 1 frimærker.
1988
Avaition Pioneers - Igor Sikorsky, 1889-1972
23. juni VM: Ingen Design: R. Wicks. Gravering: D. Brown, G. Chaconas, G. Slaught Perforeringer: 11
![[Avaition Pioneers - Igor Sikorsky, 1889-1972, type CN]](https://www.stampworld.com/media/catalogue/United-States/Airmail-stamps/CN-s.jpg)
