I have a French threaded Normandy hub on a Peugeot, but the owner had brought the bike back with him from France, which he'd bought new in 1975. This was not uncommon. I did the same around 1971. Both travel and the cost of bicycles in Europe was once a great bargain against a strong dollar.
I also have a Campy Record high flange hubset with French threads (how weird is THAT!). They were take-offs from a Rene Herse bike from around 1970. Apparently the owner later decided they were just
not good enough - and had them replaced with Maxi-car hubs. Of course, Record hubs are just Record hubs, whatever the threading. But, in this case the insides of the cutouts in the flanges were lined with a vermillion colored enamel which had matched the lettering on the bike. Talk about obsessive silly details!