If memory serves, Elkhart imported saxes for both Canada and U.S.
That's why you see the 'Ex Canada' stuff on the bell. London handled the UK, except for Canada.
Offhand, I don't know if UK horns were assembled in London or Paris, but I would guess Paris, as posts here and elsewhere don't mention much about a real operation in London, just an importer. Plus, with France just across the channel, it wouldn't make much financial sense to mount a large operation in London, whereas in the U.S. it was a much different situation(distance, large market, import duty financial considerations, etc.).
That's why you see the 'Ex Canada' stuff on the bell. London handled the UK, except for Canada.
Offhand, I don't know if UK horns were assembled in London or Paris, but I would guess Paris, as posts here and elsewhere don't mention much about a real operation in London, just an importer. Plus, with France just across the channel, it wouldn't make much financial sense to mount a large operation in London, whereas in the U.S. it was a much different situation(distance, large market, import duty financial considerations, etc.).