non-fixie
Senior Retro Guru
This is a Peugeot, a PY model and probably a Custom order from Peugeots equivalent of Raleigh SBDU ( Atelier Prestige ) I've had 70's Peugeots with such features. Peugeot made lots of VITUS steel most latterly 980 tubing ( for example the Mont Cenis model in the mid 80's ). I have a later Pro 10 on ebay at the moment with the same top tube internal brake cable routing.
I am by no means a Peugeot specialist, and you may well be right, but those Prugnat 62bis', the semi-wrapover seat stay style, and that fork crown (Ekla H?) are not details I recall having seen on Peugeots. Have you any pictures?