Thus equipped the locomotives had good riding qualities on the faster downhill run that was carried out backwards, while, for the slower uphill journey, it was sufficient to have the front coupled axle in the lead.

On these new engines the coal bunker lay behind the driver's cab, so that the distance between the third coupled axle and the trailing axle was increased by 200 mm and the total length of the locomotives by 500 mm.

The boiler (apart from the location of the steam dome) and the running gear, and hence also the performance, remained unchanged.

In 1925 the Deutsche Reichsbahn-Gesellschaft took over nine of the ten locomotives of the first series and all nine of the second redesignating them as the DRG Class 98.6 with nos.

The locomotives, numbered 1–3, performed very well on the, in places, very tight curves of the branch line, so that even in 1937 – based on drawings almost 40 years old – a fourth locomotive of this type was procured, this time from Krauss-Maffei.