USSR
Viser nu USSR - Post frimærker (1923 - 1991) - 1 frimærker.
1927
First International Airmail Congress
1. september VM: Ingen Arkstørrelse: 80 Design: O. Amosova Gravering: litho Perforeringer: 12½ x 12
![[First International Airmail Congress, type Z]](https://swmedia-4cd6.kxcdn.com/media/catalogue/USSR/Postage-stamps/Z-s.jpg)
![[First International Airmail Congress, type Z1]](https://swmedia-4cd6.kxcdn.com/media/catalogue/USSR/Postage-stamps/Z1-s.jpg)
