Seth Thomas (1785-1859) established his famous clock company in Plymouth Hollow (later renamed Thomaston in his honor) in 1813, buying out Heman Clark’s clockmaking business there. Thomas had previously worked with Eli Terry and Silas Hoadley in Plymouth. The company continued to expand during his lifetime and after his death, becoming one of America’s longest lived clock companies. The main Seth Thomas Clock Company building, which succeeded earlier structures, was built in 1915 (Note: I determined the date of the factory’s construction from a Sanborn Insurance map.). Located on South Main Street in Thomaston, it is a sprawling complex that was added to over the years. In 1931 the company became a division of General Time Instruments Corporation, later known as General Time Corporation. From World War II until 1967, the factory also made marine timing and navigational devices for the military as a defense plant. The factory was severely damaged in the Flood of 1955, but reopened the following year. In 1970, the company was taken over by Talley Industries of Seattle, Washington, which closed the Thomaston plant and moved all operations to Norcross, Georgia in 1979-1982. The old factory soon reopened as an industrial park for various small manufacturers.