Solved: PN #219 -- Mercedes-Benz 190 SL-T by Ottmann-Karosserie

[Wendax]

All I know is that it was not built by a known coachbuilder, but by a company in Northern Germany that specialized in restoration of Mercedes-Benz 190 SL.

[Allemano]

I second that.... 

[pnegyesi]

Well, the information blurb - a copy of a period article does mention a company XXX-Karosserie.
When I Googled the name of this XXX-Karosserie (the number of X-s don't represent the real number) I found only mentioning - a replica.

[Tackitt]

Lueg?

[pnegyesi]

Nope

[Tackitt]

Brinkmann?

[pnegyesi]

Nope

[pnegyesi]

mac.mr found the name of the car, that'd give you a lead

[grobmotorix]

Voss?

[pnegyesi]

Nope

[Wendax]

nope. When I tried to Google the coachbuilder's name I found only one occurence: there was a replica offered by them.

Was this other replica a Mercedes-Benz 300 SL Gullwing based on a Mercedes-Benz SL (R107)?

[grobmotorix]

Mogge of Jesteburg/Schleswig-Holstein?

[pnegyesi]

It's not Mogge and not a Merc replica

[Wendax]

Mogge of Jesteburg/Schleswig-Holstein?

Jesteburg is located in the south of Hamburg and therefore in Lower Saxony and not in Schleswig-Holstein.   

[JMC]

"Prototyp 190 SL Touring
Basis W 123, 3.0l Dieselmotor
Dieses unikat wurde won der Firma Ottmann-Karosserie"

[pnegyesi]

And we have a winner

[Carnut]

A few more pictures: