There were two German companies named Bergmann in the 1920s.
1. HR Bergmann, Fahr- und Motorräder of Breslau was a dealer who sold motorcycles by Grade, Brand and others.
2. Albert Bergmann, Motorfahrzeugbau of Rauschwalde-Görlitz is recorded as a manufacturer of motorcycles
A photograph exists of a motorcycle powered by a BMW M2B15 flat twin which has "Bergmann" clearly visible on the fuel tank. It seems likely that this machine is the product of the Rauschwalde company.
Bergmann aluminum engine with steel liners, cast iron cylinder heads, and direct-operated o.h. valves. From this view of the engine it is difficult to appreciate that it is a V twin.
An Aluminium Engine.
Another good unit for assemblers is the Bergmann, a V type with aluminium cylinders, having steel liners and vertical overhead valves directly operated by an overhead camshaft, no gear being used between the cam and the valve stem. This engine has a cast iron detachable head, and is built as a unit with the change-speed gear. It is the work of one of the most reputed German engineers, and is undoubtedly a fine piece of work.
The Motor Cycle, October 6th, 1921
Sources: Motopedia; The Motor Cycle.
If you have a query or information about these German motorcycle engines please contact us
