Between 1925 and 1929, Fiat built the 509, vehicles and chassis with a contemporary technical profile. The car sold well, and Fiat was able to sell as many as 90,000 units. This was helped not only by installment payments and insurance cover as an option, but also by the variety of models. This report portrays a Fiat 509A from 1927 and briefly describes the history and technology of the model series, supplemented with historical images and brochures.