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 – 2022     Hans Jochen Braunstein