English rack lever pocket watch in silver pair cases Circa 1820

Silver pair cased rack lever pocket watch
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An English rack lever in silver pair cases, hallmarked Chester circa 1820. Full plate gilt keywind fusee movement with dust cover. Harrison’s maintaining power. Plain cock inscribed ‘Patent Lever’, diamond endstone, plain three-arm steel balance with blue steel spiral hairspring. Rack lever escapement. White enamel dial with subsidiary seconds, Roman numerals, blue steel seconds hand and gold hands. Matching silver pair cases, silver oval pendant and bow. Maker’s mark ‘EJ’. Lateral steel stop lever acting on the lever.
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Diameter: 58 mm
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Signed: No name
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Unusually this has been made without the use of adjustable slides to the lever.