Well, those are two different companies involved here, although they are related. In 1924, the Monos Fahrzeug AG from Vienna started building threewheelers. One of those is shown in Pal's post. In 1928, Monos closed down and was taken over by Krauseco. At the same time, the Monos Fahrzeugfabrik GmbH was founded in Berlin and offered an improved threewheeler. The puzzle car is one of them. The Berlin company went bankrupt in 1929 already.