They had welded locomotive frames, boilers and tenders together with all the latest refinements of German practice.

These included a superheated multiple-valve regulator and central lubrication of the least accessible parts of the running gear.

Locomotives with serial numbers 024 and 025, as well as those from 053 onwards were equipped with roller bearings for the axles and drive as well as mixer-preheaters.

A small number of vehicles were given Heinl preheaters and several were equipped for push-pull train operations.

After its retirement it was stabled at the Nuremberg Transport Museum where it was severely damaged by the great fire in the locomotive shed on 17 October 2005.