Sovjetunionen
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1949
The 100th Anniversary of the Birth of I.P.Pavlov
30. september WM: Inga storlek på arket: 100 Design: V. Klimashin Perforering: 12¼
![[The 100th Anniversary of the Birth of I.P.Pavlov, Typ ALX]](https://swmedia-4cd6.kxcdn.com/media/catalogue/USSR/Postage-stamps/ALX-s.jpg)
![[The 100th Anniversary of the Birth of I.P.Pavlov, Typ ALY]](https://swmedia-4cd6.kxcdn.com/media/catalogue/USSR/Postage-stamps/ALY-s.jpg)