When in doubt, with a 1970s Peugeot, assume it is not a PX10. Seems like every couple of weeks someone posts a U08 or similar that they think is a PX10. Peugeot made millions of the UO8s during the bike boom, and that's usually what you will find. The really good news is that you have an upgraded BB and crankset. Thats a big plus!