Looks like a typical low end French lightweight from the fifties to seventies. There were probably more French brands that came and went during that period than any other. Those are wing nuts, the poor man's quick release. I have a French track bike of similar vintage. A Lejeune Captivante. Normandy hubs, Mavic rims, Brooks saddle, unknown crank and pedals. Rear hub had been stripped and replaced with a derailleur Shimano, which I replaced with a steel Brampton double sided fixed/freewheel hub. I also added the front brake and alloy SR seat post. Wish I could see how to attach an image without hosting it myself. Is there a trick to it?
Okay, I found out how to attach an image of my hub.