I've been looking through old Peugeot brochures and searched the numbers on the frame but I cant find any pictures of any Peugeot bikes that look like this one. The chrome section with the flags of France bordering it the major differences. Peugeot bikes that I've seen usually have a checkered flag pattern where the French flag is here. In the Chrome section there is a long black and white arrow with another French flag in it. The guy I bought it from told me it was from the late 1970s. On the dropouts there is the number 85448 and on the bottom bracket shell is the number 57. From what I have read it's basically meaningless with how inconsistent Peugeot were with their numbering.
I have a peugeot frame of a similar age and have found it to be more bother than its worth.
There was a period when peugeot made an effort to make all of their compenent dimensions round metric numbers. This practice was not adopted by many other manufacturers so getting parts to fit that frame might be a hassle.
On my peugeot frame;
Steering tube internal diameter is exactly 22mm, so standard quill stems (7/8 inch, approxmiately 22.2mm) will come frustratingly close to fitting, but wont in the end.
Pedal threads are 14mm (I think), again, frustratingly close to standard (9/16 Inch approximately 14.3mm) but incompatible.
Seat post diameter is 24mm which seems to be a defunct size, thankfully smaller diameters are available so shimming is an option.
Not sure about bottom bracket threads or anything else because I shelved the project
I sincerely hope that your frame is not of this era because they are really nice from my experience. A friend lent me an approximately late 70s/early 80s peugeot for a while and it really was very pleasant to ride.
You might find these links useful.