A gold open faced quarter repeating jump hour pocket watch, Du Bois & Fils, circa 1830,

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A gold open faced quarter repeating jump hour pocket watch, Du Bois & Fils, circa 1830,
engine turned silvered dial with eccentric minute ring, subsidiary constant seconds, hour aperture at 12, frosted gilt movement with cylinder escapement and plunge repeat on two gongs, signed gilt cuvette, engine turned case, later bow, diameter 52mm.
See Illustration (plate 4)

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