Polen
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1977
The 30th Anniversary of the Scientific and Technical Co-operation between Poland and the Soviet Union
4. April Wz: Keine Bogengröße: 30 Design: W. Surowiecki Zähnung: 11½:11
![[The 30th Anniversary of the Scientific and Technical Co-operation between Poland and the Soviet Union, Typ CAH]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Poland/Postage-stamps/CAH-s.jpg)
