Now showing: Bulgaria - Postage stamps - 1989 - EXPO `91, Plovdiv - 1 stamps.
20. April WM: None Perforation: 13¼ x 13
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![[EXPO `91, Plovdiv, type EFE]](https://www.stampworld.com/media/catalogue/Bulgaria/Postage-stamps/EFE-s.jpg)
