194mm Canon GPF (Gran Puissance Filloux) sur Chenilles.
This is the regular 194mm GPF gun on a tracked carriage built by St Chamond. The carriage had two electric engines, but no power source; the power came from the towing tracked vehicle, through a cable.
It had a version on 155mm, one on 194mm, and another which I couldn't find the caliber. Only a few were produced, and some were captured by the Germans as the 19.4cm Kanone 485(f) GPF.
The Soviets have something very similar on the 152mm Br-2, 203mm B-4, 280mm Br-5 guns, but these didn't have any internal motor, and had completely passive tracked carriages.
I got the cookie!! [:D] Tanksome almost got it!
PS: This is the Soviet 152mm Br-2 gun
