Simon Willard clocks were produced in Massachusetts in the towns of Grafton and Roxbury, near Boston, by Simon Willard (April 3, 1753 – August 30, 1848), a celebrated U.S.
clockmaker.
Among his many innovations and timekeeping improvements, Simon Willard is best known for inventing the eight-day patent timepiece that came to be known as the gallery or banjo clock.