The 6th International Proletarian Esperanto Congress 1926
Näytetään: Neuvostoliitto - Postimaksumerkit - 1926 - The 6th International Proletarian Esperanto Congress - 2 postimerkit.
1926
The 6th International Proletarian Esperanto Congress
5. elokuu VM: 1 Arkkikoko: 80 Design: V. Kupriyanov Kaiverrus: litho Perforaatio: 12½
![[The 6th International Proletarian Esperanto Congress, tyyppi U]](https://www.stampworld.com/media/catalogue/USSR/Postage-stamps/U-s.jpg)
![[The 6th International Proletarian Esperanto Congress, tyyppi U1]](https://www.stampworld.com/media/catalogue/USSR/Postage-stamps/U1-s.jpg)
