Part 5/9:
By the late 1950s, Checker recognized the inherent risks of relying solely on the taxi market; they began to diversify by developing a line of passenger vehicles aimed at consumers seeking practical alternatives. This led to the Checker A9 and A10 models, which featured minimal design changes but were known for their spaciousness and reliability. The introduction of the Checker Marathon, particularly in the 1960s, illustrated their success within the private car market, attracting sensible buyers who prioritized functionality over flamboyance.