The Nervex lugs usually indicate high quality tubing, as do the chromed front and rear fork ends. Steel cottered cranks were used on high quality bikes until about the mid 1960's; on later bikes they tend to indicate a low-end model. I would guess yours is a nicer pre-1965 model, which is high on the coolness scale around here. Period-correct French parts for that frame are not hard to find but they can get expensive, and then you may be reluctant to expose them to the daily grind of commuting. A daily commuter is sort of a beater, so I would look for cheap and functional parts if I was going to use it that way. The frame itself is plenty tough and you should have no issues with it.