500 Francs

The Banque Centrale des États de l'Afrique de l'Ouest issues notes carrying letter codes that identify the member state of circulation — a system that lets a single design serve eight countries while keeping redemption accountable to individual central treasuries. P#305C designates the Côte d'Ivoire issue, identified by the "C" suffix.

Abdoulaye Fadiga, who countersigns both the 1979 and 1980 dates here, served as BCEAO Governor from 1975 to 1988 — one of the longer tenures in the institution's history. The shift in the co-signature from Amoussou to Kalmogo between years reflects a change at the vice-governor level, not a reissue or policy change.