The story
1897 – Thomas B. Jeffery builds a rear-engine prototype motorcar using the Rambler name previously used on a highly successful line of bicycles made by Gormully & Jeffery.
1899 – Positive reviews at the 1899 Chicago International Exhibition & Tournament and the first National Automobile Show in New York City prompt the Jefferys to enter the automobile business.
1900 (Dec 6) – Thomas B. Jeffery finalizes a US$65,000 deal to buy the Kenosha, Wisconsin, factory of the defunct Sterling Bicycle with money from the sale of his interest in Gormully & Jeffery.
1901 – Two more prototypes, Models A and B, are made.
1902 – First production Ramblers – the US$750 Model C open runabout and the $850 Model D (the same car with a folding top). Both are powered by an 8-horsepower (6 kW; 8 PS), 98-cubic-inch (1.6 L) one-cylinder engine mounted beneath the seat, and are steered by a right-side tiller. First-year production totals 1,500 units making Jeffery the second-largest car maker behind Olds Motor Works.
1910 (Mar 21) – Thomas B. Jeffery dies while on vacation in Italy.
1910 (Jun 10) – Charles T. Jeffery incorporates the firm as a $3 million (US$103,660,714 in 2025 dollars) public stock company.
1914 – The Rambler name is replaced with the Jeffery moniker in honor of the company's founder, Thomas B. Jeffery.
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1916 (Aug) – Charles T. Jeffery sells the company to former GM president Charles W. Nash.
1917 – Charles W. Nash renames the company Nash Motors after himself.
From Wikipedia’s article on Thomas B. Jeffery Company, shared under CC BY-SA 4.0.4