Lynn, you have read Norris too much, a number of French bikes have those types of caps.... C. Dardenne. C.N.C. to name just two. I doubt its a C.N.C.
Nervex fork crown, with some filing...and chrome, Bertin also normally did not use an overlay cap on its bikes...sold many in the mid 70's so I do not dismiss but don't think Bertin.
could use some more strategic images like the sides of the stay/dropout joint. side view of seat stay caps, some better views of the BB shell above and below...