Rohrbach Metall-Flugzeugbau was an airplane factory located in Berlin Germany and founded in 1922 by Dr. -Rohrbach was a pioneer in building airplanes based on the metal stressed skin principle. At the time of the early aircraft production the Versailles Treaty forbade the construction of large aircraft in Germany and their export so Rohrbach set up a Danish company the 'Rohrbach-Metall-Aeroplan Co. A-S' to build the early Rohrbach aircraft.