25 Francs Grand-Bassam

The Banque de l'Afrique Occidentale was a private institution operating under French colonial charter, and this 25-franc note — payable at Grand-Bassam, then the administrative capital of Côte d'Ivoire — predates the shift of that role to Boulogne-sur-Mer and eventually Abidjan. Grand-Bassam was already in decline by 1920, devastated by repeated yellow fever epidemics in the early 1900s that had gutted its European population and prompted the colonial administration to relocate.

The Florian brothers — Ernest and Frédéric — engraved the plates, a family pairing unusual enough to note. The BAO series from this period was produced at the Banque de France's printing works in Paris, the same facility handling metropolitan French currency.