French two colour gold minute repeating clockwatch Circa 1820

Gold grande & petite Sonnerie clock watch
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An exceptionally fine and important French, 18 carat two colour gold triple train minute repeating clock watch, circa 1820. Grande & petite Sonnerie, made in the Garde Temps tradition, with independent trains for the time, striking and repeating, two hammers for each train. Sold to Monsieur le Comte d’Archinto on May 22nd, 1820, for 1,800 Francs. An engine turned case made by Joly. Glazed gold rimmed cuvette with quarters only/hours & quarters and silence/sonnerie selection levers at the edge. Silver, engine-turned dial, radial Roman numerals on a brushed reserve, outer dot minute divisions, secured by a single blued steel screw and blued steel Breguet hands.
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Matte gilt, full plate movement, turned pillars, two barrels for the going and striking trains, counterpoised lateral lever escapement with jewelled pallets, two arm bimetallic compensation balance with adjusting screws set into the rims, elastic suspension on both pivots, blued steel Breguet balance spring, Grande and Petite sonnerie striking on two gongs with two hammers, independent minute repeating train with two hammers on two gongs activated by a pull and twist piston in the pendant. Dial, cuvette and movement signed, case and movement numbered, dial punch numbered 2489 on the back.
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Diameter: 53 mm
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Signed: Breguet  Paris