Attractive French gold and enamel quarter repeater Circa 1790

Open face keywound repeating verge by Gregson
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A fine and attractive French 18 carat gold and enamel open faced keywound quarter repeating verge watch, circa 1790. Gilt finished verge movement, finely engraved and pierced balance cock, chain fusée, quarter repeating on two hammers onto a bell. White enamel dial with Roman numerals and gilt serpentine hands. Geometrical royal blue and white champlevé enamel decorated case, intertwined royal blue and white champlevé enamel fleur-de-lis motif on black background, framed by white and blue enamel border, repeating through the pendant. Dial and movement signed.
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Diameter: 50 mm
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Signed: Gregson A Paris