Conference of Postal Ministers of Socialist Countries, Warsaw 1961
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1961
Conference of Postal Ministers of Socialist Countries, Warsaw
19. juni WM: 12 Design: Vertel József Gravyr: Mélynyomat Perforering: 13½
![[Conference of Postal Ministers of Socialist Countries, Warsaw, Typ BIX]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Hungary/Postage-stamps/BIX-s.jpg)
![[Conference of Postal Ministers of Socialist Countries, Warsaw, Typ BIY]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Hungary/Postage-stamps/BIY-s.jpg)
![[Conference of Postal Ministers of Socialist Countries, Warsaw, Typ BIZ]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Hungary/Postage-stamps/BIZ-s.jpg)
