Conference for Security and Co-operation in Europe, held in Helsinki, Finland 1975
Now showing: Poland - Postage stamps - 1975 - Conference for Security and Co-operation in Europe, held in Helsinki, Finland - 1 stamps.
1975
Conference for Security and Co-operation in Europe, held in Helsinki, Finland
30. July WM: None Sheetsize: 30 Design: H. Chyliński Perforation: 11¼:11½
![[Conference for Security and Co-operation in Europe, held in Helsinki, Finland, type BWH]](https://www.stampworld.com/media/catalogue/Poland/Postage-stamps/BWH-s.jpg)
