1867                       Carl Sinzig
1872                      Bernhard Harsch
          - 1879          Hermann Friedrich
1879 – 1886     Prof. Gottfried Mayrhofer
1886 – 1895     Albin Krumbholz
                         Willy Fahr
1907                 Philipp Bade
1909 – 1914     Philipp Bade
1923 – 1944     Lill Erik Hafgren
                         Hans Hautz
1918                 Heinrich Stieber
                         Otto Schwendy
                        Ernst Leibrock
1947 – 1970     Artur Reinhard
1970 – 2001     Gerhard Koch
2001 –              Hans Jochen Braunstein