1975 BMW -- One owner since 1975 -- And yes, the original owner's manual is still around as well.
This motorcycle was my father's summer joy until declining health meant he had to stop riding.
At this point, the motorcycle has not been ridden for a couple years, and will need some work to get it running again, but there is every reason to believe once tuned up it will serve you as well as it served my father.
Full Disclosure: I am not an expert on engine specs, however the engine identifier corresponds to the engine numbers assigned to the R75/6 model -- which is 745 CC and 50 horsepower.
There are parts that show the R75/6 branding as well.