Prezentat acum: Angola - Timbre poştale (1870 - 2019) - 1 timbre.
1971
The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda
22. August WM: Niciunul Marimea foii: 50 Design: José de Moura Gravură: INCM Perforare: 13½
![[The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda, Tip KX]](https://www.stampworld.com/media/catalogue/Angola/Postage-stamps/KX-s.jpg)
