The four-ring trademark comprised the four original marques of Audi, Horch, Wanderer and DKW, car and motorcycle manufacturers originally all based in Saxony. In 1932, the four merged to form Auto Union AG and became the second-largest motor vehicle company of its day.
Auto Union enjoyed rapid expansion between 1933 and 1939 and its consolidated sales of motorcycles and motor cars rose from 65 to 276 million Reich marks. Annual production of motorcycles soared from 12,000 to 59,000 and car production from 17,000 units to more than 67,000 per year. This extremely rare showroom poster would have been displayed circa 1935 and features a range of wonderful cabriolets and limousines.
source: http://www.shop.artofmotoring.com/viewitem.php?id=248
