Small English octagonal pre hairspring verge Circa 1640

Small silver and gilt octagonal verge
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An English small silver and gilt octagonal smoky quartz pre hairspring verge watch, circa 1640, gilt full plate movement signed Issack Law, Londini, Fecit, blued steel brackets for the worm and wheel set-up, finely pierced and engraved balance cock.
Silverchamplevé dial, Roman numerals, gilt outer disc for date indication, silver base with foliate engraving, facetted octagonal smoked quartz case with engraved gilt band, fitted case.
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Diameter: (length) 37 mm
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Signed: Issack Law London