Watch movement with spring detent escapement by John Arnold and Son

Made:
1787 in London
Watch movement by John Arnold and Son, London, c.1787

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Watch movement by John Arnold and Son, London, c.1787
Science Museum Group / The Clockmakers' Museum
© The Board of Trustees of the Science Museumum

Watch movement by John Arnold and Son, London, c.1787. Movement only, with no dial. Spring detent escapement with OZ balance. The original helical spring has been replaced by a flat steel spring with overcoil. Signed on backplate ‘John Arnold & Son London Inv. et Fecit 251/552’. Clockmakers' Museum No. 421

Details

Category:
Clockmakers
Collection:
The Worshipful Company of Clockmakers
Object Number:
L2015-3334
Materials:
brass (copper, zinc alloy), steel (metal) and diamond
Measurements:
overall: 42 mm x 42 mm x 20 mm,
type:
watch movement and detent
credit:
Lent by the Worshipful Company of Clockmakers