English engine turned gold watch in original box Circa 1820

Gold gentleman’s lever pocket watch by Robert Roskell
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A rare, English, gentleman’s pocket watch with Massey-Typ-II-lever escapement according to Edward Massey with an original box, circa 1820.
An 18 Carat gold engine-turned case with a reeded band and case maker punch mark EJ. Signed enamel dial with radial Roman hours, auxiliary seconds, and gold spade hands. Keywind, frosted, gilt full plate movement, signed Patent; with chain/fusee, large chatoned jewels Liverpool windows, moulded pillars, Massey-Typ-II-lever escapement, three-arm brass and steel ring balance, fine florally engraved balance cock, engraved regulator scale, and chatoned diamond endstone on balance.
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Diameter: 52 mm
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Weight: 129 g
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Signed:  Robert Roskell  Liverpool