In West Germany, many of BMWs facilities had been badly damaged during the war, including the Munich factory which was in ruins. Initially, the terms of Germany's surrender forbade BMW from manufacturing motorcycles. In 1947, when BMW received permission to restart motorcycle production from US authorities in Bavaria, BMW had to start from scratch. There were no plans, blueprints, or schematic drawings because they were all in Eisenach. The first post-war BMW motorcycle in Western Germany, was the 1948 "BMW R 24". The "R 24" was reverse-engineered from the pre-war "BMW R 23" motorcycle with several improvements and powered by a single-cylinder engine. It was the only postwar West German model without rear suspension. In 1949, BMW produced 9,200 units and by 1950 production surpassed 17,000 units.