Early English 18k gold open faced lever deck watch Circa 1830

Gold precision watch by Henry Parkinson
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An early English 18 carat gold open faced lever deck watch, circa 1830. Early English precision lever movement, diamond endstone, screwed gold chatons, chain/fusee, large balance, splendidly engraved gilt cock with a grotesque face. White enamel dial with Roman hours and outer minute divisions, large seconds indication for observation purposes, original, very massive gold hands. Plain case, London punches 1830, original dust protection ring.
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Diameter: 53 mm
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Weight: 132 g
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Signed: Henry Parkinson London