The Saxon XIV HT class nos. 1801 to 1906, (later DRB 75-501 to 505 and 511 to 588) are 2-6-2 Prairie type tank steam locomotives, built between 1914 and 1921, for the Königlich Sächsische Staatseisenbahnen (Royal Saxon State Railways), and Its sucessor, the Deutsche Reichsbahn Gesellshaft (DRG). They were used ahead of passenger trains.
Locomotive Wiki