English rose gold rack lever with stop feature Circa 1803

Watch with Litherland’s patent rack lever escapement by Robert Roskell
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A fine, very rare English 18 carat rose gold pair cased pocket watch with Litherland’s patent rack lever escapement and stop feature, Hallmarked Chester 1803-1804. Hinged, frosted gilt full plate movement with ringed cylindrical pillars, fusee and chain, rack lever escapement with large brass escape wheel, three armed steel flat rim balance with flat balance spring, diamond endstone, single footed foliate engraved cock, regulator arm with engraved scale on the backplate, stop slide protruding from the bezel. White enamel dial with Arabic numerals, outer dot minute divisions, large subsidiary seconds with inner five-second divisions and fine pierced gold hands. Polished consular outer case, master mark TH, the inner case also polished with gilt brass dust cap. Movement signed both cases with matching hallmarks.
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Diameter: 57 mm
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Signed: Robert Roskell Liverpool
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The rack lever escapement was patented by Peter Litherland in 1792 and was used by both Liverpool and London makers during the first quarter of the 19th century. This watch is rare due to the gold pair case, as most rack lever watches were made with silver cases.