Bulgarien
Viser nu Bulgarien - Post frimærker (1879 - 2024) - 1 frimærker.
1977
The 4th Congress of the Inter Parliamentary Union (IPU)
12. september VM: Ingen Perforeringer: 13¼
![[The 4th Congress of the Inter Parliamentary Union (IPU), type COF]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Bulgaria/Postage-stamps/COF-s.jpg)