Auto Union
Auto Union was an amalgamation of 4 German car manufacturers, established in 1932 in Chemnitz, Saxony, during the Great Depression. The four companies are Horch, Audi, DKW and Wanderer. Auto Union has a rich history with a great chapter in racing.
Nowadays the company has evolved into Audi, a subsidiary of Volkswagen Group.
Auto Union? Pretty certain this is an Auto Union racing car, from the late 1930s... not sure which model exactly...