This clock was made by the chronometer pioneer John Harrison, at the age of 22 and before he began his celebrated project to build chronometers that would be accurate enough to calculate a ship's longitude at sea. The clock movement is made almost entirely of wood, partly, it is thought, to reduce the need for lubrication, but also because Harrison was a carpenter by trade. The clock movement was weight-driven and the clock would have been mounted in a long case with a pendulum.

Inv. 1884-80/1