These are electric taxi cabs made by Namag (Norddeutsche Automobil-und Motoren A.G.) from about 1908. These were essentially horse drawn broughams, with the horse replaced by electric motors in the front wheel hubs. The taxis were manufactured under a French Krieger license, using an electric wheel motor design which was similar to the Lohner-Porsche principle. These taxis were sometimes called by the name of their operators. For example: in Hamburg they were called HEDAG, which was the name of their operator (Hamburger Electric Droschkenwagen-AG).