Automobil-Bau- und Construktions-Werkstätte (ABC), Berlin. 1922-1925
Managed by Gerhard Sedlmayer, the German company had no relationship with its English and French namesakes. It built belt-drive single-speed machines with engines from Gruhn, Hanfland and probably DKW.
Sources: gtue-oldtimerservice.de, de.wikipedia.org
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