Photograph by Zoltan Glass. Hans Geier at the wheel of his no 8 car, the Mercedes-Benz W25 GP, is surrounded by mechanics at the end of the race. Alfred Neubauer (pointing at Geier) was the manager of the Mercedes Grand Prix team. He devised a system of boards and flags to keep the drivers informed of their speed and position.
© Zoltan Glass / National Science & Media Museum / Science & Society Picture Library