all stamps : Stamps for sale - Guinea Bissau
Now showing: Guinea Bissau - Postage stamps (1974 - 2018) - 3 stamps.
8. June WM: None Perforation: 11
![[The 100th Anniversary of the Universal Postal Union (1974), type O1]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Guinea-Bissau/Postage-stamps/O1-s.jpg)
8. June WM: None Perforation: 11
![[The 100th Anniversary of the Universal Postal Union (1974), type O1]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Guinea-Bissau/Postage-stamps/O1-s.jpg)
8. June WM: None Perforation: 11
![[The 100th Anniversary of the Universal Postal Union (1974), type O1]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Guinea-Bissau/Postage-stamps/O1-s.jpg)
Now showing: Guinea Bissau - Postage stamps (1974 - 2018) - 3 stamps.
8. June WM: None Perforation: 11
8. June WM: None Perforation: 11
8. June WM: None Perforation: 11