Been searching everywhere for any information on Fontans, this is the only place I've found it besides learning of Victor Fontan on wikipedia, go figure. I have a Fontan "mystere" mixte and I love it. Bought it off CL in DC three years back for $50. The vintage Samir Saminox wheels are worth more than the frame probably but the value is in the rarity. Took it into my local shop in Chicago and they raved about it. They are rare no matter the model and should be restored if possible. Didn't have to do much; put road bars on, trued the wheels a bit, still looking for the right ideale saddle to complete it. Still....a great ride and the color is sick. Not sure this helps but I found some info on different components of this bike.

-Mixte frame
-Simplex shifter and derailleurs (http://velo-orange.blogspot.com/2006...erailleur.html)
-Original Samir Saminox wheels (http://www.bikeforums.net/archive/in.../t-669759.html)
-Mafac "Racer" Brakes (http://en.wikipedia.org/wiki/Mafac)
-Nervar crankset (http://velo-orange.blogspot.com/2006...ut-nervar.html)
-Lytard Pedals (http://www.classiclightweights.co.uk...s/lyotard.html)
-Pivo vintage stem