Institut d'émission de l'Afrique Équatoriale Française et du Cameroun, 10 francs, type of 1957, prefix A.1, blue, Colbert at left, Gautier and Panouillot signatures,(Pick 29, TBB B502a, Leclerc-Kolsky 540b), good very fine and this denomination rare and a first prefix for type.
Estimate: £300 - £400