Geological 1978
Now showing: Portugal - Postage stamps - 1978 - Geological - 4 stamps.
1978
Geological
6. March WM: None Design: CTT Portugal. Engraving: Imprensa Nacional Casa da Moeda. Perforation: 12 x 11¾
![[Geological, type XQ]](https://www.stampworld.com/media/catalogue/Portugal/Postage-stamps/XQ-s.jpg)
![[Geological, type XR]](https://www.stampworld.com/media/catalogue/Portugal/Postage-stamps/XR-s.jpg)
![[Geological, type XS]](https://www.stampworld.com/media/catalogue/Portugal/Postage-stamps/XS-s.jpg)
![[Geological, type XT]](https://www.stampworld.com/media/catalogue/Portugal/Postage-stamps/XT-s.jpg)
