Actually, only the Opel cars from 1909 are called "Doctor's Car '. Top of the picture are shown two, one of whom even comes from Italy. They are from 1912, however still look exactly like the first doctor's cars. They have already 9 kW (12 hp) instead of 6 kW (8 hp). These cars are important for the Opel factories, it is yet the first real self-development after the time of Lutzmann and Darraqc.
This is of course possible only with a certain rationalization, not only in manufacturing but also in sales. Opel offers - just like the great French manufacturer - the cars complete and leaves only the choice between a small number of builds, then of course all in contrast to the chassis made of wood. One aims already at this time, clearly to the price-conscious buyer and has the corresponding success.