English 18K gold minute repeating duplex watch Circa 1822

Gold open faced repeater by John Cross
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A fine and heavy English 18 carat gold open faced minute repeating duplex pocket watch, circa 1822. Full plate movement, chain and fusee, two hammers, two gongs and a heavy secondary error compensation balance. White enamel dial with Roman hours, an outer minute track, sunk subsidiary seconds at 6 o’clock and spade & whip hands. The plain case with maker’s mark FH for Frederick Humbert London. Cuvette signed and numbered, case numbered.
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Diameter: 55 mm
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Weight: 169 g
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Signed: John Crofs Charterhouse Square London
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John Cross is listed in London, Charterhouse Square, from 1819 to 1855.