Now showing: Poland - Postage stamps (1860 - 2024) - 1 stamps.
31. May WM: None Sheetsize: 30 Design: E. John Perforation: 10¾; 11¼
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![[The 8th Trade Union Congress in Warsaw, type XKG]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Poland/Postage-stamps/XKG-s.jpg)
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