/Stamps by countries/Europa/Bulgaria/
Sofia Zoo. Bison.
23.05.1966

Michel 1624      Scott 1491      Yvert 1422
Rare mammals. Wisent.
29.06.1973

Michel 2252      Scott 2102      Yvert 2012
Animals acclimatized in Bulgaria. Wisent.
25.09.2000

Michel 4486      Scott 4161      Yvert 3883
 
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