English gold cylinder watch with en grisaille portrait Circa 1850

Gold and enamel pocket watch by Dent
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A very fine English 18K gold and enamel open faced cylinder pocket watch, circa 1850.
The case back with an en grisaille enamel miniature portrait of the Duke of Wellington in uniform framed by gold foliate scrolls on a black ground, engraved edges, signed gold dome, case maker’s mark P.E. Gilt engraved dial, radial Roman numerals, auxiliary seconds and blued spade hands. Frosted gilt bridge movement, key-wound, cylinder escapement, three-arm ring balance.
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Diameter: 43 mm
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Weight: 56 g
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Signed: E.J. Dent 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.