Bavarian D XII
The Bavarian Class D XII steam locomotives were manufactured by the firm of Krauss from 1897 for the Royal Bavarian State Railways
Royal Bavarian State Railways
As a nation-state, Germany did not come into being until the creation of the German Empire in 1871 from the various German-speaking states such as Prussia, Bavaria, Saxony, Baden and Württemberg. By then each of the major states had formed its own state railway and these continued to remain...

 (Königlich Bayerische Staatsbahn). Ninety six of them were procured for service on the stub lines running from Munich into the mountains, but in reality they were stationed in many large Bavarian locomotive depots (Bahnbetriebswerk
A Bahnbetriebswerk is the equivalent of a locomotive depot on the German and Austrian railways. It is an installation that carries out the maintenance, minor repairs, refuelling and cleaning of locomotives and other motive power. In addition it organises the deployment of locomotives and crews...

or Bw). Two engines were transferred to the Palatinate Railway
Palatinate Railway
The Palatinate Railway or Pfalzbahn was an early German railway company in the period of the German Empire prior to the First World War. It was formed on 1 January 1870, as the United Palatinate Railway based in Ludwigshafen, by the amalgamation of the following railway companies:*The Palatine...

 (Pfalzbahn) in 1916, the remaining 94 later joined the Deutsche Reichsbahn
Deutsche Reichsbahn-Gesellschaft
The Deutsche Reichsbahn – was the name of the German national railway created from the railways of the individual states of the German Empire following the end of World War I....

 fleet and were incorporated as DRG Class 73.0-1 with operating numbers 73 031–124.

The Palatinate Railway procured the almost identical Palatine P 2.II class in 31 examples during the years 1900 to 1903. 28 engines were taken over as 73 001–028 by the Deutsche Reichsbahn, the remaining three were handed over to the Saar Railway (Saarbahn).

Between 1903 and 1912, 37 engines went to the Imperial Railways in Alsace-Lorraine
Imperial Railways in Alsace-Lorraine
The Imperial Railways in Alsace-Lorraine were the first railways owned by the German Empire.They emerged in 1871, after France had ceded the region of Alsace-Lorraine to the German Empire under the terms of the peace treaty following the Franco-Prussian War...

 (Reichseisenbahnen in Elsaß-Lothringen) and were given the numbers T 5 6601–6637. One of these vehicles was taken over by the Deutsche Reichsbahn under operating number 73 125.

The Bavarian Pt 2/5 H
Bavarian Pt 2/5 H
The Bavarian Class Pt 2/5 H locomotive of the Royal Bavarian State Railways was built by Krauss for the Nuremberg Trade Fair in 1906. Because this locomotive could no longer fully meet the performance requirements at that time, it remained a one-off. It was nevertheless taken over by the...

built in 1906 as a one-off, had shown that the use of a superheater
A superheater is a device used to convert saturated steam or wet steam into dry steam used for power generation or processes. There are three types of superheaters namely: radiant, convection, and separately fired...

 brought no clear gains due to the low coupled axle load. As a result, in 1907 nine similar machines with saturated steam operation were built, the as Bavarian Pt 2/5 N class. These engines were incorporated into the Deutsche Reichsbahn as numbers 73 131 to 73 139.

Most of the locomotives were retired by 1925; but several examples were still in the vehicle park until 1948.

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