Class 99 is the classification of German narrow gauge locomotives used by the Deutsche Reichsbahn or her successor administrations.
The three engines of DRG Class 99.22 were standard, narrow gauge locomotives (Einheitsloks) in service with the German Reichsbahn.
The Harz Narrow Gauge Railways (German: Harzer Schmalspurbahnen or HSB) is a railway company that operates a metre-gauge network in the Harz mountains, in central Germany (formerly East Germany).
The German term Neubaulokomotive specifically refers to those steam locomotives which were newly designed and built, either for the Deutsche Bundesbahn in West Germany or the Deutsche Reichsbahn in East Germany, after the Second World War.
The Nordhausen-Wernigerode Railway Company incorporated twelve Mallet locomotives into its fleet as Numbers 11 to 22.
A Schwartzkopff-Eckhardt II bogie (Schwartzkopff-Eckhardt-II-Lenkgestell or Schwartzkopff-Eckhardt-Gestell) is a mechanical device to improve the curve running of steam locomotives.
The Selke Valley Railway (Selketalbahn), Gernrode-Harzgerode Railway (Gernroder-Harzgeroder Eisenbahn) and the Anhalt Harz Railway (Anhaltische Harzbahn) were different names for the metre gauge railway in the Lower Harz, Germany, originally owned by the Gernrode-Harzgerode Railway Company (Gernrode-Harzgeroder Eisenbahn-Gesellschaft, GHE).
A steam locomotive is a type of railway locomotive that produces its pulling power through a steam engine.
The Trofimoff valve (Trofimoff-Schieber) (also Trofimov, Troffimoff or Trofimof) is a springless pressure-compensation piston valve for steam locomotives.