A painting by Carlo Demand (More about his bio http://www.kolumbus.fi/leif.snellman/demand.htm).

"Rudi Caracciola (Mercedes-Benz), Bernd Rosemeyer (Auto union), Tazio Nuvolari (Alfa Romeo), German GP 1937. Rudi won, Bernd finished third after a broken hub cap forced him to do an early pit stop and Tazio finished 4th". Source:http://www.kolumbus.fi/leif.snellman/art.htm