They also became a major manufacturer of tower and street clocks after 1872 and in between 1915 were manufacturers of jeweled watches.
Seth Thomas was born in Wolcott, Connecticut in 1785, went to work for clockmaker Eli Terry in 1807, bought out Terry’s factory (together with Silas Hoadley) in 1810, and in December 1813 bought out Heman Clark’s clock making business in Plymouth Hollow. Thomas incorporated the Seth Thomas Clock Company, so that the business would outlive him. Thomas died in 1859, and Plymouth Hollow was renamed Thomaston in his honor in 1865. Thomas was very conservative, and after his death many new styles of clocks were introduced by his sons. The patterns and machinery for these had been purchased in 1859 from the creditors of bankrupt clockmaker Silas B. Usually, the year is done in reverse, followed by a letter A–L representing the month. In 1930 a holding company named General Time Instruments Corporation was formed to unite Seth Thomas Clock Company with Western Clock Company.The firm's decline was gradual over the next 50 years and culminated in the firm's removal from Connecticut to Norcross, Georgia about 1975.It was reported in 1988 that the firm was all but dissolved and, in 2003, the in-house collection of the firm was sold to private collectors.Seth Thomas must have sold many clocks in the Lafayette, Indiana area, for out of all the antique clocks we repair, about 40% are made by Seth Thomas. 1895; black (Adamantine finish) wood mantel clocks, ca.Many American clock factories in the 19th century suffered factory fires but Seth Thomas was fortunate in this respect. 1885–1917; black enameled iron cased clocks, 1892–ca. 1915; tambour clocks, introduced in 1904; chime clocks, introduced in 1909; and electric A/C clocks, introduced in 1928.