English pair cased watch with Tortoiseshell case Circa 1690

Silver open faced pocket watch by Edward Enys
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An English silver rare pair cased verge pocket watch, circa 1690.
Pair cases: silver outer case, covered with tortoiseshell, stud decoration and large lateral hinge; silver polished inner case. Enamel dial with radial Arabic numerals and filigree hands. Full plate movement, keywind, firegilt, applied engraved ornaments, signed, chain/fusee, tulip pillars, three-arm iron balance, blued balance spring, very finely engraved pierced balance cock with angel face.
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Diameter: 54 mm
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Weight: 119 g
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Signed: Edward Enys, London