Lämmle Hurricane special on a Volkswagen chassis / Switzerland

[Iluvatar]

I assume this was a one-off.

I know the name of the car of the two builders, who share the same family name, so maybe they were brothers or father and son.

Not Thorndahl.

To help I can say that there is an "germanic Umlaut" in the family name of the builders, that means an "ä, ö or ü".

For all non german speaking visitors and members of autopuzzles.com here´s more information about it:

http://en.wikipedia.org/wiki/Germanic_umlaut

Tüscher brothers from Zurich?

[Limo]

I already mentioned Tüscher on Page 1... (seconds earlier) 

[João]

Höhener?

[fyreline]

Müller?

[grobmotorix]

Not Tüscher.

[Limo]

Walter Köng?

[grobmotorix]

None of those, sorry guys!

[Limo]

Hänni?

[grobmotorix]

Not this one.

[Carnut]

Kölz?

[Limo]

Ernst Lüscher?

[grobmotorix]

Not one öf those, but I´m astonished how many of those Umlaut-filled names are around...

[Carnut]

Glückler?

[grobmotorix]

Nö, not Glöckler either.

[grobmotorix]

Some germanic Umlaut-names are still left...

[Allemano]

Complete shot in the dark: Müller? (simply the most common German surname with a Umlaut)

[grobmotorix]

Darker than outer space. Not Müller.

[thorax]

Bauer?

[Allemano]

ü,ä, or ö is missing.

[grobmotorix]

Black hole?

[Otto Puzzell]

SCHÄFER?

[grobmotorix]

No, sorry.

[grobmotorix]

Bläck höle? 

[grobmotorix]

Up and away...

[Paul Jaray]

I'd love to see this one solved...
Do the builders share their name with anything\anyone known?