German gold lever with deadbeat center seconds Circa 1876

Rose gold open faced keyless lever by A. Lange & Söhne
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A fine German 18 carat rose gold open faced keyless lever pocket watch with deadbeat center seconds, circa 1876. 3/4 Plate gilt finished jewelled lever movement, bimetallic compensation balance, diamond set endstone, glazed dust cover. Rose gold cuvette. White enamel dial with Roman numerals, outer calibrated minute track, deadbeat seconds and sunken subsidiary seconds. Polished case, deadbeat seconds operated through the crown. Movement signed by watchmaker, case, cuvette and movement numbered.
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Diameter: 52.5 mm
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Signed: A. Lange & Söhne Glashütte B/Dresden