Issued by the Republic of the Congo in 1969, this commemorative pair celebrates the 5th anniversary (1964–1969) of the African Development Bank, a key institution promoting economic development across Africa. The stamps feature the emblem of the bank with the African continent map at the center, symbolizing continental unity and economic cooperation. The design is presented in two denominations—25F (red) and 30F (blue)—forming a visually striking matching set. These stamps are valued by collectors for their historical significance related to African economic institutions and their clean, symbolic graphic design. Well-centered mint pairs are especially desirable in thematic collections focused on development, finance, or African regional organizations.