Swiss gold watch with colourful polychrome enamel dial Circa 1820

Gold watch with cylinder escapement
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A very fine, very thin Swiss, 18K gold pocket watch with a gilded polychrome enamel dial, circa 1820. An engine-turned case, small dial, white enamel with dauphine Arabic numerals, outer minute track, outer border finely decorated with pastel pink, blue and green enamel panels painted with gilt flowers and leaves, black edging. Blued steel Breguet hands. A full plate movement, frosted gilt, standing barrel, cylinder escapement, three-arm steel balance, blued steel flat balance spring, shaped and pierced steel cock with two screws, index regulator. Dial signed, the reverse inscribed No. 1 and with an illegible signature.
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Diameter: 55 mm
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Signed: Courvoisier Freres  Swiss