Here is what is known about it. The wheels do not appear original. Both are Rigida but the back has a 1987 date code and no serrations on the rim with a 14-26 cogset. The front has no date code but does have serrations on the rim. The head tube decal indicates 1970-1973, but no catalog lists a UO8 in purple during that period.
The brakes are Mafac Racers with Weinmann pads. The brake levers are Mafac with Diacompe safety levers. the Diacompes do not have a date code. The seat looks original and is Agda 28A.
The chainguard says Nervar. The chainrings are stamped 52-40 but I am not sure who made the rings. Cottered cranks have no name. The pedals say Lyotard on the endcap.
Both derailleurs are Simplex. The stem is AVA. The front/rear reflectors both are Cateye.