This German company, established in 1862, started to manufacture cars in 1899, 4 years after the death of its founder Adam Opel. The 10/50 launched in 1925 was quickly renamed 10/45 and 10/40. The latter is reproduced here in a version dated 1928, a year before General Motors bought Opel. The figure 10 stands for the fiscal power in Germany and 40, the power of the engine.