Banque Nationale, Specimen 50- and 100-Makuta, 1968/67, multicoloured, Mobutu at right (P.11, 12), 5-Zaires/500-Makuta, 1967 (P.13b), and 5-Zaires, 1971 (P.14), all with red SPECIMEN overprint, zero serial no., uncirculated except small ink numeral in top margin on first three examples, scarce (4)