French gold, enamel and pearl set repeating à toc watch Circa 1790

Gold dumb quarter repeater
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A French 18 carat gold, enamel and pearl set open faced quarter repeating à toc pocket watch made by Robert Robin in Paris, circa 1790. The gilt movement with a cylinder escapement, and pierced and engraved balance bridge. White enamel dial with Breguet hour numerals, an outer minute track and blued moon hands. Both bezels are set with split pearls, the hinged case back is overlaid with translucent blue enamel over engine turning and further decorated with a heightened gold star motif. Movement signed and numbered, signed Robin HO^GR. Du Roy to the dial plate bezel.
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Diameter: 37 mm
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Signed: Robin à Paris
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From the Justice Warren Shepro Collection of Clocks.
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Montre à toc. A ‘dumb’ repeater watch in which a hammer strikes the inside of the case to produce a muffled sound. Invented by Julian Le Roy in 1740.