English gold later cased open faced verge watch Circa 1750

An English gold later cased gilt key wind open faced pocket watch, circa 1750 (and later). Gilt full plate fusee verge movement, pierced and engraved balance cock, silver regulation. Later white enamel dial, black Arabic numerals, black outer 1/2 minute markers and gilt spade hands. Later gilt polished inner and outer pair cases. Case stamped ‘J.P.’, movement signed.
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Diameter: 43 mm
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Signed: Geo. e Graham London
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This watch is not numbered in Jeremy Evans Thomas Tompion at the Dial and Three Crowns.