Now showing: Bulgaria - Postage stamps - 1967 - The 10th Philatelic Congress, Sofia - 1 stamps.
4. February WM: None Perforation: 10½
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![[The 10th Philatelic Congress, Sofia, type BEH]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Bulgaria/Postage-stamps/BEH-s.jpg)
