Bill Murray wrote:Hi Markus:
I'm not trying to be picky here, it is a pretty bad photo, but I think your car is a 1939 Oldsmobile, not a Chev.
Note the heavy horizontal bars on the grille, the placement of the headlamps "in" the fender instead of "on" the fender and the slightly more angular look to the windscreen which is also a bit wider than a Chev.
Interesting! Possibly an Opel manufactured 'derived design'? Opel manufactored a lot of GM in house adapted designs..