International Geophysical Co-operation 1959
Now showing: USSR - Postage stamps - 1959 - International Geophysical Co-operation - 3 stamps.
1959
International Geophysical Co-operation
18. August WM: None Sheetsize: 50 Design: I. Levin Perforation: 12 x 12ΒΌ
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![[International Geophysical Co-operation, type BTS]](https://www.stampworld.com/media/catalogue/USSR/Postage-stamps/BTS-s.jpg)
![[International Geophysical Co-operation, type BTT]](https://www.stampworld.com/media/catalogue/USSR/Postage-stamps/BTT-s.jpg)