French miniature gold and enamel pendant watch Circa 1850

Small gold keywind lady’s watch
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A very small French, miniature 18 carat gold and enamel lady’s keywind pendant watch, circa 1850. A polished case, hinged reserve with floral outer decoration in pale blue and gold, inner pale pink border to a central flower display, coin edge band, hinged gold cuvette. White enamel dial, radial Roman numerals, outer minutes and gold Breguet hands. A frosted gilt movement, bar calibre, eight jewels, cylinder escapement, three arm frosted gilt balance with flat blued steel balance spring, index regulator. The case is signed.
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Diameter: 21 mm
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Signed: J.J. Delarue  Paris
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Some scratches on the case