Answer: Simple. They did not have production lines before Ford.
Explanation:
On December 1, 1913, Henry Ford installs the first moving assembly line for the mass production of an entire automobile. His innovation reduced the time it took to build a car from more than 12 hours to two hours and 30 minutes. The most significant piece of Ford's efficiency crusade was the assembly line.
Perhaps the greatest way in which these two time periods were similar is in terms of intolerant attitudes. Both we periods of great discrimination against minorities and women. The 1950s saw far more of a literary revival than the 20s.