Hello Mark VIII,
there is a windmill at
Wolmirstedt (north and near Magdeburg) called "Auerbachs Mühle"(Auerbach's windmill), build on a farmers ground with the name Auerbach in 1842.
The distance from Oschersleben to Wolmirstedt is around 50km /30miles).
Possibly this is the place you are looking for??? (and why?)
Link:
https://www.auerbachs-muehle.de/wir-...ie-muehle.html
https://www.landkreis-boerde.de/erle...eiten/muehlen/
digedag1