Maria, I thought of you when I found it!
*dryly* I wonder why.
Thanks anyway. Cool thread.
I don't know much about the other types and brands of motorcycles, but I do know my BMWs, so:
Beware! Mama's turn to go geek - motorcycle stuff follows!
During the war years, BMW produces the following models:
R12: 1935-1941.
R35: 1937-1940.
R23: 1938-1940.
R51: 1938-1940.
R66: 1938-1941.
R61: 1938-1941.
R71: 1938-1941.
And finally the R75, which was produced from 1941 to 1944.
It is typically this model which can be seen in war movies, complete with sidecar and machine gun mounted on the sidecar.
All photos copyright and courtesy of BMW Motorrad Deutschland - AG Historisches Archiv.
More will follow on the BMW motorcycles during the war years if the interest is there, but for the time being, it's bedtime here. *yawns*
EDIT:
The BMW R4 was also used, here's a nice photo example found on the internet: