French gold cylinder watch with chatelaine Circa 1798-1809

Gold watch with chatelaine
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A French fine, small, 18K gold and champlevé enamel pendant watch with a two-color gold and enamel chatelaine, Paris hallmarks for 1798-1809. Gilt brass movement, full plate, going barrel, cylinder escapement, three-arm brass balance wheel, both pivots jewelled, shaped cock, index regulator.
Case by Joly, polished bezel, the band decorated with black champleve enamel and stylised gold leaves, the back cover decorated with graduated rings of dark blue and skyblue enamel with geometric patterns and leaves, the centre with foliate engraved monogram PS. Chatelaine with pale blue oval enamelled disc applied with chased foliate gold initials ES, surrounded by a two-coloured gold ribbon and leaf border and with three chains below, for the watch, a seal and a key.
White enamel dial with radial Roman numerals, outer minute track. Blued steel Breguet hands. Scratched on the dial plate: Aubert a Paris, 13 Mai 1808. Case with Joly Mastermark.
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Diameter: 29 mm
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Signed: Bausse au Meridien, Boulevard D’Antin, Paris
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Accompanied by a leather covered fitted box.