English gold quarter repeating chronometer Circa 1815

Gold repeating duplex watch by Richard Ganthony
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A heavy English 18 carat gold open faced quarter repeating duplex pocket chronometer, circa 1815. Full plate movement, duplex escapement, two hammers, two gongs, balance spring with temperature compensation, three-arm gold balance. Monogrammed cuvette. Off-white enamel dial with Roman hours, outer minute divisions and subsidiary seconds at 6 o’clock. Plain case, maker’s mark WM, a hallmark of 1814. Dial and movement signed and numbered.
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Diameter: 57 mm
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Weight: 165 g
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Signed: Ganthony London Lombard Street
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The unusual temperature compensation and the masterly execution make this a very interesting timepiece by the Clockmaker’s Company of London. The typically English, off-white dial bears the signature of Richard Ganthony, who was freed from the company in 1794 after his apprenticeship with Thomas Miles and who became a master in 1828. His son Richard Pinfold Ganthony was also a watchmaker. Father and son presumably both died around 1845.