Now showing: Czech Republic - Postage stamps (1993 - 2024) - 1 stamps.
31. May WM: None Sheetsize: 50 Perforation: 11¾ x 11¼
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![[World Mathematical Year, type IU]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Czech-Republic/Postage-stamps/IU-s.jpg)
