The 100th anniversary of the International Socialistic Union 1964
Now showing: Belgium - Postage stamps - 1964 - The 100th anniversary of the International Socialistic Union - 3 stamps.
1964
The 100th anniversary of the International Socialistic Union
18. July WM: None Sheetsize: 30 Design: Luc Verstraete. Perforation: 11½
![[The 100th anniversary of the International Socialistic Union, type ADH]](https://www.stampworld.com/media/catalogue/Belgium/Postage-stamps/ADH-s.jpg)
![[The 100th anniversary of the International Socialistic Union, type ADI]](https://www.stampworld.com/media/catalogue/Belgium/Postage-stamps/ADI-s.jpg)
![[The 100th anniversary of the International Socialistic Union, type ADJ]](https://www.stampworld.com/media/catalogue/Belgium/Postage-stamps/ADJ-s.jpg)
