Now showing: Poland - Postage stamps - 1958 - International Geophysical Year - 2 stamps.
30. září WM: Žádný Sheetsize: 70 Design: S. Jasiński Perforation: 12½
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![[International Geophysical Year, type ZD]](https://www.stampworld.com/media/catalogue/Poland/Postage-stamps/ZD-s.jpg)
![[International Geophysical Year, type ZE]](https://www.stampworld.com/media/catalogue/Poland/Postage-stamps/ZE-s.jpg)
