/Stamps by countries/Europa/USSR/
Protect useful animals. Wisent.
1957

Michel 1927      Scott 1920      Yvert 1907      CPA 1990
Nature Reserves. Askania-Nova Nature Reserve, American bison and Zebra.
1968

Michel 3545      Scott 3517      Yvert 3416      CPA 3667
Nature Reserve Belovezhskaya Pushcha. Wisents.
1969

Michel 3669      Scott 3642      Yvert 3530      CPA 3796
Nature Reserves. Caucasian Nature Reserve, Wisent.
1973

Michel 4137      Scott 4093      Yvert 3945      CPA 4248
 
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