Now showing: Portugal - Postage stamps (1970 - 1979) - 4 stamps.
1970
Opening of the Oil Refinery in Porto
5. June WM: None Design: Antonio Lino Engraving: Casa da Moeda Perforation: 13½
![[Opening of the Oil Refinery in Porto, type NJ]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Portugal/Postage-stamps/NJ-s.jpg)
![[Opening of the Oil Refinery in Porto, type NK]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Portugal/Postage-stamps/NK-s.jpg)
![[Opening of the Oil Refinery in Porto, type NJ1]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Portugal/Postage-stamps/NJ1-s.jpg)
![[Opening of the Oil Refinery in Porto, type NK1]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Portugal/Postage-stamps/NK1-s.jpg)
