Sovjetunionen
Visar nu: Sovjetunionen - Postfrimärken (1923 - 1991) - 1 frimärken.
1969
The 3rd International Congress of Protozoologists
10. juni WM: Inga storlek på arket: 50 Design: B. Trifonov Perforering: 11½
![[The 3rd International Congress of Protozoologists, Typ DUL]](https://swmedia-4cd6.kxcdn.com/media/catalogue/USSR/Postage-stamps/DUL-s.jpg)
