Cuda:
Yeah, Borgward was a bit of a guess but I think I will find it.
Re: the Dodge, we need to be careful here, or at least I do.
That it is a 1940 year model I am comfortable with. However, the hood ornament is wrong for a Dodge. I think the "mask" chrome piece in the middle is just missing.
As you probably know, Chrysler marketed the basic Dodge truck as respectively, Fargo, DeSoto and Plymouth on various export markets.
I cannot prove it yet, but I think this one may be a Fargo.
FWIW, I agree with Thor on #6.
If he is correct, and I see he just ID'd #2 as another Fiat, this should give us some direction on the coachbuilder's location.
Bit of a puzzling puzzle, but fun to research.