All Cars Charly III, but the german-market 4-wheeler version, known as the Steinwinter Amigo 50.
It used a Fichtel & Sachs SC50 engine, and probably a CVT, instead of the more common Morini, mated with a 3 ou 4-speed gearbox.
I don't know exactly when it was introduced, but it seems it was produced until 1987, with the final demise of the All Cars company, based in Pianoro.
The funny thing being that the 4-wheeler Charly was NOT sold in France. We only had it as a tricycle, and with the previous Charly II body.