Rare French stone cased quarter repeater á toc Circa 1790

Very rare gold stone cased quarter repeating á toc watch 
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A very rare gold French stone cased quarter repeating á toc watch, circa 1790,  gilt verge movement signed Bertrand A Paris, pierced and engraved bridge cock with polished steel coqueret.
White enamel dial, Arabic numerals, gold decorative hands.
Stone bezels and engraved stone case back.
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Diameter: 47 mm
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Weight: 83 g
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Signed: Bertrand A Paris
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Most of these stone cased watches did not survive time.
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Reference 0027000