English interesting gold open faced chronometer Circa 1810

Gold chronometer in the manner of Earnshaw
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A historically interesting pocket chronometer in the manner of Earnshaw made by John Gibson in London, England, circa 1810. The heavy case, which was crafted from 18 carat gold, opens on both sides, is punched LC and bears London Hallmarks for 1810. The white enamel dial has Roman hour numerals, outer minute divisions, a subsidiary seconds dial at 6 o’clock and gold spade hands. The numbered high quality movement is fitted with a spring detent chronometer escapement, screwed gold chatons, a chronometer balance and diamond endstone.
The cuvette and movement have matching numbers and are signed.
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Diameter: 53 mm
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Weight: 146 g
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Signed: John Gibson Royal Exchange London
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Gibson
Robert Gibson was an ingenious watchmaker and an excellent geometrician. He was based in Hempstead, London Borough of Camden. It is possible that he was a brother of John Gibson at Sweetings Alley, who was famous for his chronometers and duplex movements.