Polydor Records was founded on 2 April 1913 by German Polyphon-Musikwerke AG in Leipzig and registered on 25 July 1914 (Nr. 316613). The label was founded as Firma Brachhausen & Riesener in 1887 by Gustav Adolf Brachhausen and Ernst Paul Riessner, for manufacturing their new mechanical disc-playing music box Polyphon, invented in 1870. During World War I on 24 April 1917, Polyphon-Musikwerke AG acquired the German Deutsche Grammophon-Aktiengesellschaft record plant and company from the German government. The German state had taken over British-held Grammophon as enemy property during World War I.