The VW-Porsche Escher Kleinbahn was a series of small trains produced from 1954 to 1971 for use in parks and botanical gardens. These trains consisted of a locomotive that resembled a blend of the iconic TEE train and the Porsche 356, pulling three cars capable of accommodating up to 90 passengers. The locomotive was equipped with a VW industrial engine and served as the prototype for the VW-Porsche train line.
Source: 7/9/2011 on JustACarGuy Blog Post