Image by wwwuppertal
…the one on the right hand side is an original made by Märklin (and was sold under the catalog number TWE 12930); on the left hand side there is a modern modification, made from old Märklin bodies and a new middle car. The prototypes of these vehicles were put into service in the 1930s. Märklin brought out their models immediately.
From time to time a group of enthusiasts and collectors of historic toy trains meets in an old engine shed at the station of Erkrath-Hochdahl (near Düsseldorf). The site has been converted into a small railway museum. The tin plate fans set up two extended make-shift layouts (in gauge 1 and gauge 0 respectively) and enjoy running their classic rolling stock. The meetings are open to the public.
Promotional documentary released in 1952 by Marathon Newsreel Production in association with the Budd company. Shows the railcars being manufactured and in operation. Also features many steam and diesel trains from the early 1950’s. From en.wikipedia.org The Budd Rail Diesel Car or RDC is a self-propelled diesel-hydraulic multiple unit railcar. In the period 1949–62, 398 RDCs were built by the Budd Company of Philadelphia, Pennsylvania, United States. The cars were primarily adopted for passenger service in rural areas with low traffic density or in short-haul commuter service, and were less expensive to operate in this context than a traditional locomotive-drawn train. The cars could be used singly or several coupled together in train sets and controlled from the cab of the front unit. The RDC was one of the few versions of the DMU-type train diesel multiple unit to achieve commercial success in North America. The basic car was adapted from a standard 85 ft (25.91 m) coach. They were powered by two Detroit Diesel (then a division of General Motors) Series 110 diesel engines, each of which drives an axle through a hydraulic torque converter, a technology adapted from military tanks of World War II. RDC trains were an early example of self-contained diesel multiple units, an arrangement now in common use by railways all over the world.