I made some other researches, and I found that this little car built by Maurer in 1923 (perhaps just two cars), had a 2 cilinders flat, two stroke engine, 2,6 cv, and chain transmission to rear axle.
Ludwig Maurer took parts also in another firm, the Maurer-Union between 1900 and 1910, and some of his little cars, were built in Great Britain under licence by Dougill of Leeds.