Now showing: Bulgaria - Postage stamps (1879 - 2024) - 1 stamps.
20. April WM: None Perforation: 12½
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![[Congress of the Bulgarian Communist Party, type BTE]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Bulgaria/Postage-stamps/BTE-s.jpg)
![[Congress of the Bulgarian Communist Party, type BTF]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Bulgaria/Postage-stamps/BTF-s.jpg)
![[Congress of the Bulgarian Communist Party, type BTG]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Bulgaria/Postage-stamps/BTG-s.jpg)
