Anton Proebst was a German teacher, choir master and composer. There is little biographical information about him, the details below are all I could gather:
Anton Proebst was born on 10 February 1890. After school he moved to Straubing and made a qualification as a teacher which included musical studies at that time. In 1919 at the latest he settled in Landshut, worked as a teacher at the Martinsschule and became the new choir master of the Landshuter Liedertafel. In the following two decades Anton Proebst conducted several large performances with his choir and supporting orchestras like the "Missa Solemnis" by Beethoven in 1921, the Coronation Mass by Mozart in 1922 or the oratorio Elijah by Mendelssohn Bartholdy in 1926. The choir also performed own compositions by Anton Proebst, for example the song "Die Wacht am Rhein" in 1925. In 1931 Anton Proebst resigned from the position of choir master. He continued to work as a teacher and retired early in the late 1930s. After World War II he became district school inspector from 1945 to 1955 and received an "Outstanding Citizen Award" for his achievements from the city of Landshut in 1966. Anton Proebst died on 8 December 1978 in Landshut (Germany).
I own the main musical estate of Anton Proebst. That includes manuscripts of most of his compositions. For an overview on his works I compiled a work catalogue:
For information purposes I present here a composition by Anton Proebst, his Marienlied op.7: