English 18K gold and enamel watch with chatelaine Circa 1780

Gold verge with complimenting chatelaine 
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An English 18K gold and enamel open faced key wind verge pocket watch with complimenting chatelaine, circa 1780. Gilt full plate verge fusee movement, a pierced and engraved balance cock, silver regulation disc.
White enamel dial with Roman hours, outer five-minute numerals, a winding aperture at 4 o’clock and gilt beetle & poker hands. Consular case, both bezels are translucent blue enamelled decorated with white enamel pearls, the back with an en grisaille enamel scene possibly depicting Diana with a bow and a putto on a dark blue guilloché enamel ground surrounded by a decorative frame. Accompanied by a matching chatelaine with fobs decorated with translucent green and blue enamel, white enamel pearls and three more en grisaille enamel paintings. Movement signed, case stamped LW.
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Diameter: 40 mm
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Signed: J. Perigal London
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John Perigal, Coventry Street, London, Clockmakers’ Compagnie 1781-1800.
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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.
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The Roman goddess Diana was the daughter of Leto and Zeus, the supreme god. Her twin brother was Apollo. As the goddess of the hunt, Diana is often depicted with a bow and arrow. She lived in the forest, in the company of her companions, the nymphs.
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In sculpture and painting, a putto (plural: putti) is a plump child figure, almost always male and usually naked. If the child has wings, it is also called a cherub. Putti are mainly found in Renaissance, Baroque and rococo art.