English 18 carat gold pocket chronometer watch Circa 1840

Open faced pocket watch with spring detent escapement
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An English pocket chronometer with spring detent escapement, circa 1841.
18 carat gold engine turned case with case maker’s punch mark “HH”. White enamel dial -signed “Arnold, 84 Strand London 6154″- with Roman numerals and a subsidiary dial for constant seconds. The signed movement is a 1/2 plate movement with a chain/fusee, a gold screw compensation balance with platinum regulation screws and a helical balance spring.
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Diameter: 49 mm
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Weight: 84 g
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Signed: John Roger Arnold, 84 Strand, London