Rare and unusual gold quarter repeater with date Circa 1815

Gold open faced quarter repeating watch by Carl Zademach
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A rare and unusual German 18 carat gold open faced quarter repeating pocket watch with date, circa 1815. Engraved gilt finished pin wheel escapement, quarter repeating on two gongs activated by a push repeat in the crown. Engraved gilt cuvette.
White enamel dial with Breguet numerals, inner calibrated date ring. Plain hinged case, engraved scalloped band. Cuvette and dial signed.
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Diameter: 62 mm
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Signed: C. Zademach A Leipzig