The 8th World Trade Union Congress, Varna, Bulgaria 1973
Now showing: Czechoslovakia - Postage stamps - 1973 - The 8th World Trade Union Congress, Varna, Bulgaria - 1 stamps.
1973
The 8th World Trade Union Congress, Varna, Bulgaria
15. October WM: None Design: I. Strnad Engraving: M. Ondráček Perforation: 11½ x 11¼
![[The 8th World Trade Union Congress, Varna, Bulgaria, type BIZ]](https://www.stampworld.com/media/catalogue/Czechoslovakia/Postage-stamps/BIZ-s.jpg)
