 In 1928 the firm passed under the control of Günther Quandt who moved the company into the production of business machines, acquiring typewriter manufacturer Olympia Schreibmaschinen in 1929, and opening a new factory in 1933 at Erfurt to manufacture cash registers and other business machines.Under Herr Quandt's leadership further acquisitions followed.In 1938 the firm re-entered the field of munitions production, establishing Metallwarenfabrik Spreewerk to undertake the fabrication of munitions components at the former Berlin-Spandau factory of the defunct Deutsche Waffen und Munitionsfabriken.