English 18K gold open faced lever pocket watch Circa 1854

Gold lever watch by Charles Frodsham
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A fine English 18 carat gold open faced lever pocket watch, Hallmarked London 1854. Hinged,  frosted gilt 3/4 plate movement, ring turned pillars, fusee and chain, maintaining power, lateral calibrated lever escapement, cut bimetallic compensation balance with blued steel flat balance spring, index regulator. Fixed gold cuvette. White enamel dial with Roman numerals, outer minute track, subsidiary seconds and original gold spade hands. Engine turned case back, master mark AS, reeded band. Dial and movement signed, dial numbered.
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Diameter: 49 mm
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Signed: Arnold Chas Frodham 84 Strand London