International Scientific Cooperation 1967
Now showing: USSR - Postage stamps - 1967 - International Scientific Cooperation - 2 stamps.
1967
International Scientific Cooperation
10. March WM: None Sheetsize: 50 Design: V. Pimenov Perforation: 11½
![[International Scientific Cooperation, type DIY]](https://www.stampworld.com/media/catalogue/USSR/Postage-stamps/DIY-s.jpg)
![[International Scientific Cooperation, type DIZ]](https://www.stampworld.com/media/catalogue/USSR/Postage-stamps/DIZ-s.jpg)