The 6th International Proletarian Esperanto Congress 1926
Ditunjukkan sekarang: Kesatuan Soviet - Setem-setem bayaran pos - 1926 - The 6th International Proletarian Esperanto Congress - 2 Setem-setem.
1926
The 6th International Proletarian Esperanto Congress
5. August WM: 1 Saiz Helaian: 80 Corak: V. Kupriyanov Ukiran: litho Perforasi: 12½
![[The 6th International Proletarian Esperanto Congress, jenis U]](https://www.stampworld.com/media/catalogue/USSR/Postage-stamps/U-s.jpg)
![[The 6th International Proletarian Esperanto Congress, jenis U1]](https://www.stampworld.com/media/catalogue/USSR/Postage-stamps/U1-s.jpg)
