Sovjetunionen
Visar nu: Sovjetunionen - Postfrimärken (1923 - 1991) - 1 frimärken.
1927
First International Airmail Congress
1. september WM: Inga storlek på arket: 80 Design: O. Amosova Gravyr: litho Perforering: 12½ x 12
![[First International Airmail Congress, Typ Z]](https://swmedia-4cd6.kxcdn.com/media/catalogue/USSR/Postage-stamps/Z-s.jpg)
![[First International Airmail Congress, Typ Z1]](https://swmedia-4cd6.kxcdn.com/media/catalogue/USSR/Postage-stamps/Z1-s.jpg)
