Ok, the name I was after was Laffly V15T.
The Laffly V15T was a French light 4WD artillery tractor used during World War II. It was used to tow the 25 mm SA anti-tank guns.
The Laffly company itself only manufactured the first batch of 100 V15s, the rest of the production being taken over by La Licorne company. I'm not sure that this one derived from one of the firsts V15T, but this is how it's called where I found this.
But You found the car and the point is yours!
here are some picture of Tessier's Comete and its recreation...(they were waiting for further quizzes, but....)