European Conference on Security and Cooperation 1973
Now showing: Hungary - Postage stamps - 1973 - European Conference on Security and Cooperation - 1 stamps.
Now showing: Hungary - Postage stamps - 1973 - European Conference on Security and Cooperation - 1 stamps.
![[European Conference on Security and Cooperation, type ]](https://www.stampworld.com/media/catalogue/Hungary/Postage-stamps/2905-b.jpg)
