 At the outset single locomotives were even used in the Thumer Netz and in Wilsdruff.On the hilly routes of Hainsberg–Kipsdorf, Cranzahl–Oberwiesenthal and Zittau–Oybin/Jonsdorf, however, these powerful engines soon became the main prime movers.Today the Class 99.73-76 locomotives are stationed in Zittau and Freital-Hainsberg.