Trieste Zone B
1950-1954Viser nu Trieste Zone B - Post frimærker (1948 - 1954) - 1 frimærker.
1950
International Labor Day
1. maj VM: Ingen Arkstørrelse: 50 Design: R. Krošelj Perforeringer: 12½
![[International Labor Day, type W]](https://www.stampworld.com/media/catalogue/Trieste-Zone-B/Postage-stamps/W-s.jpg)
![[International Labor Day, type W1]](https://www.stampworld.com/media/catalogue/Trieste-Zone-B/Postage-stamps/W1-s.jpg)
