 Henry's disdain for cosmetic vanity as applied to automobiles led him to leave the Model A's styling to a team led by his son Edsel, even though he would take credit for it despite his son doing more of the work.It was during the period from the mid-1920s to early 1930s that the limits of the first generation of mass production, epitomized by the Model T production system's rigidity, became apparent.The era of "flexible mass production" had begun.