Heavy English 18K gold open faced precision lever Circa 1874

Gold precision pocket watch by Parkinson & Frodsham
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A very fine and heavy English 18 carat gold open faced lever precision pocket watch, Hallmarked London 1874. English precision movement, lever escapement, extra-large balance, finely engraved cock. White enamel dial with Roman hours and outer minute divisions, subsidiary seconds, blued steel hands. Engraved case. Case numbered, dial signed, movement signed and numbered, case and movement with matching numbers.
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Diameter: 53 mm
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Weight: 121 g
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Signed: Parkinson & Frodsham London
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In 1801 the chronometer makers William Parkinson and William James Frodsham founded a chronometer factory under the name Parkinson & Frodsham. The company was located at 4 Change Alley, Cornhill, London. Parkinson and Frodsham mainly concentrated on the production of fine pocket and marine chronometers.