I don't know the base vehicle, but I know the coachbuilder and year. Please id the coachbuilder correctly so I can give you a point!
Experts?
German? The design could be by N2.
German. I don't think it's by Neumann-Neander
Body by Neuss fom Berlin?
no
Coachbuilder from Berlin?
a bit more than 400 km from Berlin
A radius of 400 km to 450 km results in a large number of potential bodywork manufacturers. Shall we narrow it down a bit to the federal state?
Let's do that! Lower Saxony
Karmann?
no
Benz 14/30 by Delmenhorster Wagenfabrik in 1911. "coachbuild.com" says it's designed by Neumann-Neander.
I did not look at coachbuild.com sorry. I used this original article.
Anyhow, your point!
Thank you for this extraordinary vehicle.