x Republique du Tchad, Banque des Etats de LAfrique Centrale, specimen proof 500 francs, ND (1974), serial number O.0 00000, brown, woman at left, cranes, stork, flamingos and hippos at centre, reverse, mask at left, students studying at centre, wooden statue at right, no signatures, (Pick 2sp, TBB B201s, Leclerc/Kolsky 560/561 for type), in PMG holder 67 EPQ Superb Gem Uncirculated, rare