Now showing: Czechoslovakia - Postage stamps (1918 - 1992) - 1 stamps.
6. October WM: None Perforation: 12½
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![[International Labour Bureau - Overprinted "B.I.T. 1937", type YDL]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Czechoslovakia/Postage-stamps/YDL-s.jpg)
![[International Labour Bureau - Overprinted "B.I.T. 1937", type YDL1]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Czechoslovakia/Postage-stamps/YDL1-s.jpg)
![[International Labour Bureau - Overprinted "B.I.T. 1937", type YDL2]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Czechoslovakia/Postage-stamps/YDL2-s.jpg)
