TT PK 6s 1960 RWANDA-BURUNDI 500 FRANCS SPECIMEN BLACK RHINO PCGS 68 PPQ SUPERB!TT PK 6s 1960 61 RWANDA BURUNDI 500 FRANCS SPECIMEN BLACK RHINO PCGS 68 PPQ SUPERB GEM UNCIRCULATED! 1960 61 500 Francs from Rwanda Burundi. Pk 6s and serial number A00000 44. Specimen banknote graded 68 Premium Paper Quality Superb Gem Uncirculated by PCGS. This near perfection example is the only one graded at 68 grade level according to PMG Population Report. An iconic banknote issued near the end of the colonial era in Africa, this note features a