Collections and Large Lots. EPREUVES DE LUXE SELECTION: 1961-72, 38 epreuves de luxe, each one contains two stamps printed opposite each other, representing mainly postage due stamps of Cameroon (8), Chad (2), Congo (6), Dahomey (6), Gabon (6), Mali (5) and Mauritania (5), complete and incomplete sets, most signed by artist, with or without colorless official seal, mostly VF, Est. $500-$600 (Image)