French pair-cased watch with tortoiseshell outer case Circa 1782

Silver open faced pocket watch by Jean Jaques Aubert
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A rare French pair-cased verge pocket watch with tortoiseshell outer case, circa 1782.
Outer case – silver and tortoiseshell with applied stud decoration and large lateral hinge; inner case – silver, polished with case maker’s punch mark “FAC” and large lateral hinge. Enamel dial with radial Roman hours, Arabic minutes and Louis XV hands. Full plate movement, keywind, firegilt, chain/fusee, baluster movement pillars, three-arm brass balance, florally engraved pierced balance bridge.
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Diameter: 52 mm
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Weight: 106 g
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Signed: Jean Jaques Aubert