Сега показвам: Ангола - Пощенски разноски марки (1970 - 1979) - 1 марки.
1971
The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda
22. Август воден знак: Никой размер: 50 дизайн: José de Moura Гравиране: INCM Пробиване: 13½
![[The 5th Anniversary of the Regional Soil and Foundation Engineering Conference, Luanda, тип KX]](https://www.stampworld.com/media/catalogue/Angola/Postage-stamps/KX-s.jpg)
