English 18 carat gold extremely heavy chronometer Circa 1809

Chronometer with duplex escapement
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An extremely heavy chronometer with duplex escapement, made by John Gibson in London, England, circa 1809. The numbered, plain and extremely heavy and high quality case of this watch was crafted from 18 carat gold and bears the master’s mark DW. The white enamel dial features Roman hour numerals, a subsidiary seconds dial at 6 o’clock and high quality gold hands. The very fine movement is fitted with  a large chronometer balance, a diamond end stone, a duplex escapement and a magnificently engraved cock.
The case and movement have matching numbers and the dial and movement are signed.
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Diameter: 56 mm
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Weight: 185 g
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Signed: John Gibson, Royal Exchange, London
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Gibson

John Gibson was acquitted by the Clockmakers Company in 1806 and was listed as a maker of fine chronometers and duplex watches until 1824.