The first two batches, delivered in 1863 and 1864, had a large goblet-shaped smokestack and open driver's platform with a windshield.

Batches 3 and 4, delivered from 1865 to 1867 added a roof over the driver's platform; the smokestacks were now cylindrical or pear-shaped and an injector and pump for the feedwater.

The first batch had side windows on the driver's cab and cylindrical or funnel-shaped chimneys.

The final batch of 6 engines, delivered in 1871, were peat-fired with funnel smokestacks and no side windows and rounded corners to the cabs.

[4] The last two examples remaining in service (422 WREDE and 432 MARKTL) were transferred to the ownership of the Reichsbahn in 1920 and were listed in the DRG's 1923 provisional renumbering plan as nos.