English chronometer with spring detent escapement Circa 1824

Silver open faced pocket watch by Robert Roskell
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A large English pocket chronometer with spring detent escapement and with original mahogany box, circa 1824.
Silver engine turned case with reeded band and case maker punch mark “LW”. Signed enamel dial with radial Roman hours, auxiliary seconds and gold spade hands. Full plate movement, keywind, frosted, gilt and signed, with chatoned, chain/fusee, moulded pillars, chronometer balance with two weights and four screws, freesprung blued helical balance spring and chatoned diamond endstone on balance.
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Diameter: 72 mm
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Weight: 299 g
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Signed: Rob Roskell, Liverpool
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Robert Roskell was a qualified watch- and clockmaker in Liverpool and London. Due to his various partnerships and takeovers, he signed in turn with: “Robert & Son”, “Hunt & Roskell”, “Robert Roskell Liverpool” or “Roskell Liverpool”.