The Sessions Clock Company ("Sessions") was one of several notable American clock companies centered in Connecticut. The E. Ingraham Company, the Ansonia Clock Company, the , the Seth Thomas Clock Company, Sessions and its predecessor , the , and the Waterbury Clock Company collectively produced most of the mechanical clocks made in America between the mid-19th century and 1950. At about 1935, Sessions ended its production of mechanical clocks and produced electrical clocks exclusively.