Sýni: Angóla - Venjuleg frímerki (1870 - 2019) - 1 frímerki.
1971
The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda
22. ágúst WM: Ekkert Síðu stærð: 50 Hönnun: José de Moura Leturgröftur: INCM Götun: 13½
![[The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda, tegund KX]](https://www.stampworld.com/media/catalogue/Angola/Postage-stamps/KX-s.jpg)
