Henry Ford family sole ownership of the company. By the mid-1920s, sales of the Model T began to decline due to rising competition. Other auto makers offered payment plans through which consumers could buy their cars, which usually included more modern mechanical features and styling not available with the Model T. Despite urgings from Edsel, Henry refused to incorporate new features into the Model T or to form a customer credit plan. By 1926, flagging sales of the Model T finally convinced Ford to make a new model. He pursued the project with a great deal of technical expertise in design of
Henry Ford car, sales reached 472,000. (Using the consumer price index, this price was equivalent to $7,828.08 in 2015 dollars.) By 1918, half of all cars in America were Model Ts. All new cars were black; as Ford wrote in his autobiography, "Any customer can have a car painted any color that he wants so long as it is black". Until the development of the assembly line, which mandated black because of its quicker drying time, Model Ts were available in other colors, including red. The design was fervently promoted and defended by Ford, and production continued as late as 1927; the