The things we miss here in parochial USofA: every KTM I've ever seen is a motorcycle.
Well, my average is going to suffer a bit more: that's a French threaded cup, one might conclude it's a French frame but what's odd is that you have 27.2 seatpost which usually means an "Imperial" dimension seat tube (if 531 or Columbus). Most French builders would use metric dimensioned tubing (as would most Swiss). Therefore, I'm going back to Austrian: they've been known to use all 3 types of BB threading at one time or another: French, BSC and even Italian on the "Bianchi Puchs"...might even be an Austrian frame with Swiss BB, but can't think of an example.
The BB shell (style as well as number stamping) seems like the best clue, I'll dig around and try to ID it: seems like it might be sand-cast, but don't think it's a Georg Fischer.