Anchor escapement | Science Museum Group Collection

Striking longcase clock movement by John Harrison, Barrow-upon Humber, North Lincolnshire, 1713. Oak dial with brass chapter ring and spandrels, and date aperture. Signed on the chapter ring 'John Harrison, Barrow, fecit'. The winding hole is concealed behind the lower spandrel. Movement of eight-day duration, with anchor escapement. The frame and most of the wheels are made of wood. Signed ‘Jon Harrison 1713’ in ink on the calendar wheel.

Earliest known eight-day longcase clock movement by John Harrison

1713

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Model of the anchor escapement used in long case clocks

Model of anchor escapement

Longcase clock movement

Earliest known eight-day longcase clock movement by John Harrison

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