Swiss quarter repeating automaton pocket watch Circa 1800-1810

Open faced repeating watch with Jacquemarts by Antoine Achard & Co.
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A Swiss, key-winding, multicoloured skeleton pocket watch with quarter-repeater and three striking Jacks on three gongs, circa 1800-1810.
Round-shaped 18-carat yellow gold case. Small, white enamel dial with Breguet numerals, outer minute track, and original blued steel Breguet hands. Gilded brass movement with fusee and chain, verge escapement, monometallic balance (gilded brass), blued steel flat hairspring, and a pierced and engraved gilded continental cock.
This extremely rare pocket watch model with three Jacks striking on three gongs has one horological complication: – Quarter-repeater on three steel gongs (activated by depressing the pendant). The chiselled varicoloured gold scene shows two Jacquemarts (Jacks), Caesar & Cleopatra, striking the elapsed time (Cleopatra strikes the hours and the first shot of the quarters while Caesar strikes the second shot of the quarters, and, below, a cherub strikes a third shot at every quarter; all animated by the repeating mechanism.
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Diameter: 57 mm
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Signed: Antoine Achard & Co.
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Achard, Marc Antoine
Swiss watchmaker Marc Antoine Achard (Marie Antoine ?) was born in Geneva on July 30, 1778 to Georges Achard and Catherine Bontoux (1747-1783) . He was the brother of Jean Pierre Gabriel Achard . Achard married Etiennette Pauline Crottet (1781-1814) on July 30, 1778 at Saint-Gervais in Geneva. From this marriage Jean-Pierre Louis Achard (†1840) and Louis Amédée Eugène Achard (1814-1875) were born. Afterwards he married Maddalena Pierrette (Petronilla) Félicité Fuzier (1795-after 1828) . October 8, 1821 in Marseilles. From this marriage Marie-Eudoxie Achard (1821-?) , Philippine Achard (1823-?) , Alexandrine Achard (1828-?) and Antoine-Edouard Achard were born.
Around 1831 he was based at Rue Mazade 12 in Marseille, Bouches-du-Rhône, Provence-Alpes-Côte-d’Azur. He then worked as an insurance agent. The date of death is not yet known.