BELGIAN CONGO - FRENCH EQUATORIAL AFRICA, 1931 "Service Fluvial, A.E.F. - Congo Belge", Middle Congo 65c (42; Yvert 99) tied by well-struck handstamp on blue cover to Leopoldville, Leopoldville Aug. 21 arrival datestamp, Very Fine, a rare French steamer marking carried on the Brazzaville-Leopoldville river route, ex Maulding, with 1996 Belgian Congo Study Circle certificate (Image)

US$350