I was teaching at the place where these machines have been constructed: the former Maffei-Schwartzkopff site in Wildau, Germany which produced the “Schienenwolf” (“rail wolf”), which the German Wehrmacht deployed during their retreat from the Soviet Union and Italy. And in the large locomotive assembly hangar 15/16, employees built the armored locomotive of the “Führersonderzug“ (or 'Hitler's chartered train').