I found another picture of the Schlörwagen "Pillbug"
here:
That site also has a better resolution picture with the propeller -- it had a fender bender:
See the missing paint and the bent 'A' pillar on the nearside front...
Also, the fresh air intake is open in this shot.
Another page (in German) that has some additional pictures!
http://www.meinklassiker.com/de/maga...ichte/2/1/2086
It loads very slowly...
Score!