French quarter repeating “seconde morte” watch Circa 1815

Gold open faced pocket watch by Chevalier & Cochet
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A French gentleman’s fine quarter repeating pocket watch and unusual jumping centre seconds “seconde morte”, circa 1815.
18 carat gold case with dedication engraving: “Souvenir d’amour Conjugal”, radial decoration and case maker punch mark “DF”. Signed enamel dial with Arabic numerals, jumping centre seconds and gold spade hands. Bridge movement, keywind, frosted, gilt, with 2 hammers, 2 gongs, going barrel, cylinder escapement and a three-arm brass balance.
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Diameter: 58 mm
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Weight: 127 g
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Signed: Chevalier & Cochet