Now showing: Bulgaria - Postage stamps (1879 - 2024) - 1 stamps.
5. April WM: None Perforation: 13¼ x 13¾
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![[Bulgarian Trade Union Congress, type DFO]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Bulgaria/Postage-stamps/DFO-s.jpg)
![[Bulgarian Trade Union Congress, type DFP]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Bulgaria/Postage-stamps/DFP-s.jpg)
