Now showing: Trieste Zone B - Postage stamps - 1950 - International Labor Day - 2 stamps.
1. May WM: None Sheetsize: 50 Design: R. Krošelj Perforation: 12½
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![[International Labor Day, type W]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Trieste-Zone-B/Postage-stamps/W-s.jpg)
![[International Labor Day, type W1]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Trieste-Zone-B/Postage-stamps/W1-s.jpg)
