We are, of course, once again in the truly murky waters of early French aviation ! Perm any two from Donnet/Leveque/Denhaut/Schreck/Levy/F.B.A./d'Artois/Besson, and you'll probably find the answer. They all appeared to be designing from the same source, with many variations. Still can't find one with the big prop, though. Time to reveal.......