French decorative multicoloured gold verge watch Circa 1780

Multicoloured gold and enamel verge by Le Roy
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A French very decorative 20K gold and enamel open faced verge pocket watch, circa 1780. Fire gilt movement, verge escapement.
White enamel dial with Roman hours, outer minute divisions, Arabic quarter hours, original gold hour hand and a replaced minute hand, small chip near the winding shaft. Multicoloured gold case, French 20K gold punches, decorative en grisaille enamel scene on the back.
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Diameter: 38 mm
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Weight: 44 g
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Signed: Le Roy Paris
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A grisaille (en grisaille), or grey painting, is a painting in which one does not apply natural colours but restricts oneself to depicting things in all possible shades of the same colour, usually grey or brown.