The steam locomotive of the DRG aeries 89, more precisely the Prussian T3, is a triple coupled tender locomotive. The first locomotive of this type was built in 1881. This possessed still no steam dome, which came only with later steam locos starting from 1887 to it. Therefore, the arrangement of sandpit and sand spreader had to be changed. Even later, further improvements and enlargements were made, such as the stocks of water and coal, which explains the versatility within the steam locomotive DRG Class 89. All in all, about 1,550 copies were mainly used by the Prussian State Railways until 1911.

The main features of the steam locomotive DRG Class 89 are the six wheels, a low-lying boiler and the long chimney. The first designer was the company Henschel & Sohn in Kassel, which gave the locomotive its first name “3/3 T.L.” (tender locomotive). This initially became T3; with the takeover of 511 locomotives in 1925 by the recently founded Deutsche Reichsbahn, the T3 with BR 89.70-75 received their still valid name.