The 6th Trade Union Congress, Prague 1967
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1967
The 6th Trade Union Congress, Prague
16. January 窗口管理器: 空缺 紙張規格 : 100 設計: F. Gross 雕版: J. Mráček 篩孔: 11½
![[The 6th Trade Union Congress, Prague, 類型 AQC]](https://www.stampworld.com/media/catalogue/Czechoslovakia/Postage-stamps/AQC-s.jpg)
