I wonder if the Superb line was ever profitable, given that at least three body styles were used over that period. However, we need to remind ourselves that many car bodies were built differently in those days. For one thing, very few cars had monocoque or unitized construction as is the case for most cars today. Also, many car bodies, including Škoda's, were not all-steel, continuing the practice of framing a body using wood and then applying a metal skin. It's likely that Škoda Superbs were built using a good deal of hand labor and that prices were quite high -- knowledgeable readers are encouraged to comment if clarification on these points is required.
Shown below are examples of five types of Superbs.
Note that the car shown has right-hand drive. Following the 1939 German take-over, Czech cars had to have left-hand drive, as was the practice in Germany.
The body of this 902 looks French, reminding me of Citroën's Traction Avant introduced in 1934.
The styling of this 913 is not very different from that of American cars of 1936, the same year 913s were launched.
Type 924 appeared in 1938, and seems to be a facelifted 913 with front end styling in line with contemporary American cars.
The same might be said regarding this 919, only 12 of which were built.