If you confirm the BB threading (specifically which direction are the threads in the non-fixed or NDS or RH cup which is the one shown as partially removed in the pix, AND confirm what the OD of the 3 main tubes are with your digital calipers, then we can at least make a guess as to how likely this is FR or if any of the other countries of origin are still in contention. As Francophile stated the serial number for something of this frame's age may not be so good a clue but if it is then maybe T-Mar is the best of the best to offer his educated guess.