English triple cased watch with Tortoiseshell case Circa 1790

Gilt tortoiseshell triple cased verge pocket watch
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A triple cased English verge pocket watch with tortoiseshell outer case and stud decoration made for the Ottoman market, circa 1790.
Three cases: tortoiseshell-covered protection case with stud decoration; outer case – brass, firegilt, tiered, engraved, with large lateral hinge and inner case – brass, firegilt, polished, with case makers punch mark “IR”. Enamel dial with radial Ottoman numerals and minutes. Full plate movement, keywind, firegilt, signed, with applied floral decorations, chain/fusee, lavishly ornamented, pierced movement pillars, verge escapement, three-arm steel balance and very finely florally engraved and pierced balance cock with flower and vase decoration.
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Diameter: 73 mm
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Weight: 218 g
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Signed: George Prior, London