Well, because of your clue, that the names of the car and the city, where it was built, are related, I already had figured out, that it could be Habag (from Hamburg), Ilse (from Ilsenburg) or Lipsia (from Leipzig), since Nowa (from Nowawes) looked different. But I didn't have any pictures of the other three on hand. But I can tell you what my one source tells about the Ilse:
In 1926, Hans Lorbach (former chief engineer of Phänomen) built the Ilse for the Fürst-Stolberg-Hütte (i.e. Count Stolberg Ironworks) in Ilsenburg near Wernigerode. The Fürst-Stolberg-Hütte was founded in 1530, built steam engines since 1833 and locomotives from 1924 to 1931. The Ilse had a 4-cylinder 2-stroke engine of 1100 cc capacity. That makes it a "6-PS-Wagen". There was never a series production.