What is the most purchased car in America 1900s?

There's no single definitive answer to what the single most purchased car in the entire 1900s (the 20th century) in America was. Sales records weren't always consistently kept across all manufacturers, and the definition of "most purchased" (by units sold or by model line, considering variations within models) creates further ambiguity.

However, strong contenders for the title would include models from Ford, particularly the Ford Model T (produced from 1908-1927). Its affordability and mass production made it incredibly popular, and it's widely considered one of the most influential and best-selling cars of all time.

Other contenders could be later Ford models that continued that legacy of affordability and mass appeal, or even Chevrolet models which became extremely popular later in the century. Precise sales figures comparing across decades and manufacturers to conclusively name the single "most purchased" car would require extensive research and possibly some assumptions due to incomplete data.