Above some images I took from a D-Rad R0/4 motorbike from 1924/1927. Its from “Deutschen Industriewerken” aus Berlin Spandau. This bike is no. 21547 from only 25500, made between 1924 – 1927. It took me a while to figure out what brand this bike is, but due to the plate on the front and the net I learned something new. The bike was standing right in front of Seil Marschall, what a match. For more infos about this kind of motorbike check
d-rad.de by Manfred Henschel or a swiss website: d-rad.ch by Benno Stöcklin.