Solved: PN #404 -- a car by Karossieriebau Heuser, cca 1928

[pnegyesi]

This time I don't know the chassis, but I know the coachbuilder and an approximate year. So you have to tell me those and if you are right I give you a point!

[Allemano]

[pnegyesi]

Experts?

[pnegyesi]

Professionals?

[grobmotorix]

The front resembles that of a 1920 Protos. Is the coachbuilder from Berlin, maybe Luchterhand?

[Wendax]

It looks smaller than a Protos to me 

[Allemano]

I was waiting for this one and think it's a very tough puzzle. I only stumbled on by pure chance.

It is an unknown based car bodied by Karossieriebau Heuser from Bensberg near Cologne. The year is ca. 1928.

[pnegyesi]

and that's all I know as well