2000 Francs CFA

The CFA franc zone covering eight West African nations — Benin, Burkina Faso, Guinea-Bissau, Ivory Coast, Mali, Niger, Senegal, and Togo — operates under a fixed parity with the euro, a arrangement inherited from the franc zone established under French colonial administration and formalized in its current structure in 1994 when the currency was devalued by 50 percent. The BCEAO's practice of rotating dual signatures across member-state finance ministers and the bank's own governance reflects the political mechanics of running a shared currency across sovereign governments with frequently divergent fiscal priorities.

The sheer number of signature combinations across this single series — at least ten documented pairings within two decades — makes date-signature matching a genuine collecting discipline rather than a footnote.