Aroung 1984/85 Peugeot banished French and Swiss BB threading, except for a very few Vitus steel framed bikes.
By 86 every bike pretty much had BSC threaded BBs, at least in the US market.....
Bad thing was, Peugeot simetimes used BBs on their low to mid model bikes back then (generic Stronglight) with no marking on them at all and sometimes figuring out what threading they had can only be done by removing them or looking at the threads that might be visible on the adjustable cup.