I would like to add that at least three of those brands seem to be German, one, probably mis-spelled, Wanderer, very famous maker of cycles, motorcyles, cars, typewriters, and machine tools, two, the equally famous Bielefeld maker Dürkopp, also into cars and motorbikes
in the twenties, with air rifles, roller bearings and sewing machines thrown in for good measure, and the other, the Münster maker of recumbents, Radius.
Diamant might also be the German one, makers of the first all-light alloy bike in the world in the late twenties, as they then claimed.
Stucchi: Any relations to Prinetti e Stucchi, early engine manufacturer?
Regards, Toni Theilmeier, Belm, Germany, who remembers the boys at Radius when they sold second hand cycles to students and parked their first unpainted recumbent in front of the refectory.