French gold quarter repeating cylinder watch Circa 1820

Gold open faced quarter repeating watch
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A very nicely preserved, French, 18K gold, hour- and quarter repeating pocket watch, circa 1820.
Engine-turned 18K red gold case with French 18K gold hallmark, No.808. Very well-preserved guilloche pattern, even on the middle part. Enamel dial with Breguet-style radial hours, outer minutes track, and blued steel hands. Cylinder movement with repetition of the hours and quarter hours.
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Diameter: 57 mm
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Weight: 114 g
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Unsigned