Czechoslovakia
Now showing: Czechoslovakia - Postage stamps (1918 - 1992) - 1 stamps.
1967
The 6th Trade Union Congress, Prague
16. January WM: None Design: F. Gross Engraving: J. Mráček Perforation: 11½
![[The 6th Trade Union Congress, Prague, type AQC]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Czechoslovakia/Postage-stamps/AQC-s.jpg)