Swiss 18K gold quarter repeating Geneva pocket watch Circa 1820

Gold pocket watch with open face by Jean Louis Archinard
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A decorative Swiss gold open faced Geneva pocket watch with a quarter-hour repeater, circa 1820.
Full plate movement, key winding, two hammers/two gongs, chain/fusee, verge escapement, three-armed brass balance. Gold dial with a surrounding flower tendril in multicoloured gold, applied gold Arabic radial hours, outer minutes track, and blued serpentine hands. Engine-turned 18K gold case, the two bezels on the front and back decorated with delicate flower tendrils.
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Diameter: 55 mm
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Weight: 101 g
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Signed: Jn Archinard
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Jean-Louis Archinard, Swiss watch manufacturer and watch dealer
Jean-Louis Archinard worked in Geneva in the first half of the 19th century. He was born in Geneva on February 25, 1770, to the watchmaker Jean-Pierre Archinard (1740-1802) and Sara Gibert (ca 1747-1811). Jean-Louis was the brother of Jacob-Hercule Archinard (1768-1845), a maker of gold, enamel, guilloche and engraved watch cases. Jacob-Hercule supplied watch cases to Vacheron & Constantin and presumably also to his brother.
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Archinard married Suzanne Rollier (1766-1860) on November 3, 1794. How this marriage went is not entirely clear; in any case, Jean-Louis fathered three children with Jeanne Françoise Lavanchy (1805-1878). Jean-Louis Lavanchy dit Archinard (1827-1900) , Jean-Charles Lavanchy dit Archinard (1829-1906) and Louise Lavanchy dit Archinard (1831-1913) . Jean-Louis later recognized her.
Jean-Louis Archinard died in Geneva on March 19, 1848.