Erad Capucine CE 2.
With this angle, I cannot tell if it is a CE 2/50 (Motobécane 99Z or BCB A40 49 cc engine), a CE 2/50 D (Farymann 290 cc diesel, ugly bulk on the nose) or a CE 2/123 (BCB A51).
I guess it is the first CE 2/50, at the 1980 Paris (car) show.
Rear engine, production by Erad, Aniche, until 1983.