I'm hoping somebody could help me out with the bottom bracket size of my Peugeot Mont Blanc, made in the mid to late 80s as far as I know.
It is similar to this-
But without the chequered flag design on the down tube (a bit new to the world of vintage bikes, but I think that might give some clue about its exact age?).
I am unsure of the BB specifics, I understand it might even have a specific type of thread? I.e French vs British...
Any help would be MUCH appreciated.