Impressive English silver open faced chronometer watch Circa 1837

Silver chronometer watch
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An impressive English silver open faced pocket chronometer, circa 1837. Gilt full plate movement, spring detent escapement, balance with two weights and two screws, fusee and chain, blued helical balance spring, finely engraved balance cock with diamond endstone.
White enamel dial with Roman hours and outer minute divisions and subsidiary seconds at 6 o’clock, blued steel fleur-de-lys hands.
Plain case, push button on top to open the case back for the winding. Movement signed.
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Diameter: 60 mm
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Weight: 180 g
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Signed: Sam Grimalde Inventor London
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Samuel Grimalde London 1804-1808, Princes Street, Edinburgh 1819, North Bridge, Edinburgh 1822-1825, London again 1832.
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Clear signs of wear and some hairlines.

Comes with silver chain and key.
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Reference 021000