The example of the Douglas boxer engine was followed by many factories outside of England; in Germany we find the same engine concept, and also on the Fongri from Italy.
Later the idea of rotating the engine 90 degrees came to BMW, laying the foundations for a long career for the boxer engine.
Hirsch - Berlin 1923
Bosch-Douglas Stationary Engine 350cc. Year 1916
German museum documentation
This is the only known example of this historically significant motorcycle.
Based in Turin and established for decades, Bretti Brothers offers vintage and classic motorcycles from the early 1900s to the mid 20th century.
More information: Bretti Brothers