Congo Postage Due Stamps 1961 Transport Series SG # D19 Unused (Hinged) SG # D20 Unused (Hinged) SG # D22 Unused (Hinged) 1971 Tropical Flowers Series (Inscribed TIMBRE TAXE) SG # D264 Used (Hinged) SG # D265 Used (Hinged) Country Index A B C D E F G H I J K L M N O P Q R S T U V W X Y Z