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was formed in 1870 by Paul Cornell, a real-estate dealer in suburban Chicago, along with J. Around 1902 railroad grade watches began being marked "Adjusted to 5 Positions." During the late 1880's the factory was producing about 150 watches per day, employing 350 people.

Their factory building was built in 1875-76, and was located on the 300 block of South Madison in Rockford (parts of the original factory building were later used by Rockford High School). At first, production was about ten watches per day. The factory, in Rockford, IL, was completed in 1876 with the first watches getting to the market later that year.Please use the following tables to help determine the approximate age of your watch.Remove or open the back cover from your watch and look for a number engraved into the movement; this is the serial number for your watch, and by using it, you can find the closest years it was made on these tables.