Antique verge fusee pocket watch made in the 1790’s by Pierre Rigaud
The verge escapement (also known as a crown wheel) is the earliest known type of mechanical escapement found in clocks and pocket watches. At the heart of it, it is the mechanism that controls its rate by allowing the gear train to advance at regular intervals or â€˜ticksâ€™. A fusee (from the French fusÃ©e, wire wound around a spindle) is a cone-shaped pulley with a helical groove around it, wound with a cord or chain which is attached to the mainspring barrel.
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