French gold quarter repeating cylinder watch Circa 1820

Gold open faced quarter repeating watch
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Very well kept, large French 18 carat gold pocket watch repeater with visible striking train, France circa 1820.
An 18 carat gold, engine-turned, excellent conditioned case, nearly unused, case maker’s punch ID, glazed dome, fine and rare caliber with cylinder escapement and visible striking train, repeating hours and quarters, very well preserved enamel dial, blued Breguet steel hands, Arabic numerals.
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Diameter: 55 mm
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Weight: 109 g
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Signed: No Name
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Dial with very fine cracks on the edge, movement and striking train needs cleaning and adjusting.