It is not a very hard puzzle. While other puzzlers have a lot of books on Italian cars, it seems my collection of books, booklets on French cars helps me to solve a lot of such puzzles
In 1959 a French engineer, Charles Cusson realized a coupe with Albert Come which was Peugeot 203 engined (pictured)
S.A.R.L. ACPA (Atelier de Carrosserie Plastique Automobile) was set up in 1962 to make this prototype in small series.
Type "Charless Cusson" and Atla in Google