Fine English silver and tortoiseshell verge watch Circa 1690

Silver and tortoiseshell pair cased verge watch
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A fine and rare English silver and tortoiseshell pair cased verge watch, circa 1690, gilt full plate movement, verge escapement, decoratively pierced and engraved balance cock and foot, flat three-arm balance, tulip pillars, fusee and chain.
Silver champlevé dial, outer circular chapter ring with Roman numerals, inner chemin de ferfor half-hours, pierced and engraved middle section, single blued steel hand, plain silver inner case, winding aperture to back, inner case numbered, tortoiseshell outer case with silver inlaid decoration, engraved birds and flowers, movement signed Hen: Jones Londini.
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Diameter: 51.5 mm
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Signed: H. Jones London