An extremely creative idea was developed by Volkswagen and the German Federal Railways when they signed a contract in 1959 for the rail transport of engines and transmissions between the various Volkswagen production sites. The solution involved standardized containers that could be transported on short-coupled double units of modified Rm(r)so 31 flatcars. These cars featured only flat structures with wooden floors, on which the support frames for the containers were mounted. Each double unit could carry six containers, which were filled with either 36 engines or 96 transmissions. By 1966, the container transport cars for engine and transmission shipments were operating between Hannover and Wolfsburg, Emden and Ingolstadt, and later also to Brussels from Kassel-Baunatal. Starting in 1970, additional destinations included Salzgitter, Neckarsulm, Stuttgart, and Osnabrück. The model is based on an open freight car double unit Laabs for container transport of the German Federal Railways, rented to Volkswagen AG. It is designed without a handbrake, featuring a container support frame and Volkswagen transport containers as cargo. The operational state is around 1971. Model: Container transport car with a spring mechanism and different identification numbers. Loaded with a total of six Volkswagen transport containers with varying container numbers. Overall length over buffers is approximately 28.2 cm. AC wheelset E700150. Trix Express wheelset E258259. Officially licensed by Volkswagen. Compatible freight cars can be found in the Trix H0 range under item number 24332 and in the Märklin H0 range under item numbers 46661, 46129, and 46139.