Diamond T Motorcar Company was established in 1907 in Chicago, Illinois, by C.A. Tilt, who was the son of a shoe manufacturer. The company adopted a distinctive trademark featuring a "T" inside a diamond, which contributed to its memorable branding. Tilt began experimenting with car designs in 1905, but the company did not officially enter the automotive market until 1907, when it introduced a large and expensive 40-horsepower car available in…