I believe it is a PX-10. It was the most common Peugeot road bike of the time and the quality contruction means there's still a lot of them out there. As for the French threading, I'm not sure but as I move along in the project I'm sure I will find out. I will also post any online resources which I use. Research I have used so far is:

http://sheldonbrown.com/fixed-conversion.html
http://sheldonbrown.com/deakins/how-...onversion.html
http://www.fixedgear.co.nz/
http://en.wikibooks.org/wiki/Bicycle...Hub_Conversion
http://bicycling.about.com/od/bikema...ed-Conversion/

And, I will try to use this site to determine the exact year of the bike once I receive it: http://www.classicrendezvous.com/Fra...10_history.htm