English centre seconds lever for the Chinese market Circa 1840

Gold, enamel and pearl-set pocket watch with centre seconds
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A very fine and rare English 18K gold, enamel and pearl-set lever pocket watch with centre seconds made for the Chinese market, circa 1840. Spring Bouquet by Just & Son. The bezel, pendant and bow set with split-pearls, hinged and sprung back cover decorated with a finely painted on enamel bouquet of poppies, nasturtiums and roses on a dark blue guilloché enamel ground, white, pale green and red enamel border with chased gold scrolls, outer split-pearl border.
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Hinged and sprung gold cuvette. White enamel dial with radial Roman numerals, outer minutes and seconds track with Arabic quarter-hour numerals, gold ovoid hands. Chinese calibre, frosted gilt movement, entirely engraved, standing barrel, eight jewels, lateral lever escapement, three-arm balance, flat balance spring, index regulator. Movement signed.
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Diameter: 55 mm
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Signed: Just & Son London
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The dial is upgraded.
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Leonard Just. Specialized in making watches for the Chinese Market, he worked in London between 1790 and 1825. Upon his death, the business passed to his son and carried on as Just & Son.