My gut level reaction is PX-10, c. 1972. I've seen several bikes identified by their original owners as 72s with the plain DuBois lugs like those, but painted black, and the more traditional 72-degree-or-so angles. Graphics are '70-74 pattern, plainer fork crown like Gitane started using about the same time ... yeah, I say 1972. I think it's the original fork, btw. Nice frame!