Walter Zeichner mentions this car in his book "Kleinwagen International". He says that Josef Ganz, who had to flee Germany after 1933, built this car called "Erfiag" when he lived in Liechtenstein. In 1943 he moved to Switzerland, but as a foreigner he was not allowed to start his own factory. So he found the Rapid company (still existing producer of lawn mowers and small tractors) who were willing to build his car. In Spring 1945 the first Rapid prototypes (that were virtually similar to Ganz' former car) were built with the same 1-cylinder 2-stroke engine. Until the beginning of 1947 a series of 36 Rapid Kleinwagen was built with a different engine, a 350 cc 1-cylinder with double pistons. Later Ganz emigrated to Australia and worked for Holden.