Portugal
Now showing: Portugal - Postage stamps (1853 - 2024) - 1 stamps.
1971
The 1st Portuguese-Spanish-American Congress for Economic Geology
24. September WM: None Design: Serviços ArtÃsticos dos CTT Engraving: Casa da Moeda Perforation: 12
![[The 1st Portuguese-Spanish-American Congress for Economic Geology, type OR]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Portugal/Postage-stamps/OR-s.jpg)
![[The 1st Portuguese-Spanish-American Congress for Economic Geology, type OS]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Portugal/Postage-stamps/OS-s.jpg)
![[The 1st Portuguese-Spanish-American Congress for Economic Geology, type OT]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Portugal/Postage-stamps/OT-s.jpg)
![[The 1st Portuguese-Spanish-American Congress for Economic Geology, type OU]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Portugal/Postage-stamps/OU-s.jpg)
