DKW SB500 Episode: 1.11
This is someone Sokół. Probably i got it. This is polish motorbike - Sokol 500 (Sokół 500) I think it is something else. In times when it was filmed, seems there was only one Sokół 500(RS) in Poland and it was placed in Tech. Museum. Now there are 2 or 3 (one still in museum). So if it is really one of Sokółs, it is IMO 1000: Link to "oldtimerbazar.pl" Less likely 600: http://zabytkowemotocykleirowery.pl/sokol_600/pl And doesn't look at all like 200: Link to "motocykle.svasti.org"
This is a DKW, my money's on mid 1930's SB 500.