DUC_TAPE, I think you accidentally posted another thread when adding the two new photos. Do add them to the existing thread though. Might give some additional insight.
The vintage gods will place a hex on you if you turn this one into a "fixie" fixed or similar.
Brazed on brake studs indicate a number of French possibilities, as do the Simplex rear dropouts.
Hack up (modify) a less interesting frame.
Send it to me! I'll send you back a far less interesting frame that you can hack away on!!