Constant Girard (La Chaux-de-Fonds, 1825 – La Chaux-de-Fonds, 1903) was a Swiss watchmaker from the 19th century, who marked his time by his developments in the escapement systems, in particular that of the tourbillon. His most famous watch, the Tourbillon with three gold bridges, is still fabricated today in modern versions by the Swiss watch manufacturer, Girard-Perregaux.
