English gold and en grisaille enamel cylinder watch Circa 1772

Gold and enamel open faced pocket watch by John Ellicot
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A rare English 18K gold and enamel open faced cylinder pocket watch, circa 1772.
Engraved à goutte case, large lateral hinge, the back decorated with two translucent cobalt blue enamelled palm leaves and a festoon on an engine-turned ground, white and blue champlevé enamel border, the centre with an en grisaille enamel plaque depicting Hercules and Omphale on the back of a lion, the en grisaille enamel painting dedicated to Toussaint, case maker’s mark TL, numbered and signed movement protection cap. White enamel dial with Arabic numerals and gold Louis XV hands. Re-gilded full plate movement, key wound, applied engraved and pierced ornaments, chain and fusee, brass cylinder wheel, solid movement pillars, three-arm steel balance, very finely engraved and pierced balance cock, large chatoned diamond endstone.
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Diameter: 51 mm
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Weight: 133 g
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Signed: John Ellicot London
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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.