Collector's DERONZIERE type 2 HP, ess, 2cv, circa 1911-1912, G & A carburettor, autoloc shifter, low-voltage magneto ignition, collector's number plate 2415 SF 18 (non-original seat), punctured front tyre chamber.) With CG. We would like to thank Mr Alain Touchet for his invaluable information and documentation on Deronzière motorbikes and their derivatives from 1907-1920 (n°81 of Motocyclettiste containing a historical and technical study of Deronzière motorbikes and derivatives).