<Tr> <Th> Industry </Th> <Td> Horology </Td> </Tr> <Tr> <Th> Founded </Th> <Td> 1850 </Td> </Tr> <Tr> <Th> Headquarters </Th> <Td> Waltham, Massachusetts, United States </Td> </Tr> <Tr> <Th> Products </Th> <Td> Watches, clocks & aircraft clocks </Td> </Tr>

Who used the american system of manufactures to produce clocks