While I agree that the Gran Luxe are pointing in the right direction, I believe the OP's frame is older, for a couple of reason's. First, the yellow Gran Luxe has the 3rd generation Allvit, which dates no earlier than 1969. Secondly, and more importantly, neither the white or yellow Gran Luxe have a bridge brazed to the seat stays for the rear brake cable stop, like the OP's bicycle. Seeing this bridge really threw me for a loop when I first it, as I had never one on a Motobecane. They definitely didn't use them during the boom and that is what makes me think that the yellow and white Gran Luxe, while pre-boom, are still newer than the OP's bicycle.