USSR
Now showing: USSR - Postage stamps (1923 - 1991) - 1 stamps.
1975
European Security and Co-operation Conference
18. August WM: None Sheetsize: 25 Design: Yury Artsimenev Perforation: 11½
![[European Security and Co-operation Conference, type EXQ]](https://swmedia-4cd6.kxcdn.com/media/catalogue/USSR/Postage-stamps/EXQ-s.jpg)