Now showing: Poland - Postage stamps - 1976 - Trade Union Congress - 1 stamps.
6. December WM: None Sheetsize: 60 Design: St. Małecki Perforation: 11
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![[Trade Union Congress, type BZK]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Poland/Postage-stamps/BZK-s.jpg)
