I worked for a shop in the 70's that handled lots of French stuff, Peugeot started to bring in English threaded stuff, (HUBS only starting in 1976, but one was at their own peril if they did not test first.. it was much later (like a decade plus) that things became English or more accurately, ISO which is Very close to English. Motobecane was doing things differently moving to Swiss threading first...The moral of the story, test, don't guess.