Bulgaria
Now showing: Bulgaria - Postage stamps (1879 - 2024) - 1 stamps.
1979
International Stamp Exhibition PHILASERDICA `79 - Soviet Union Day
23. May WM: None Perforation: 13
![[International Stamp Exhibition PHILASERDICA `79 - Soviet Union Day, type CTZ]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Bulgaria/Postage-stamps/CTZ-s.jpg)