Extremely rare German silver deck chronometer Circa 1912

Silver open faced deck chronometer with carrousel and power reserve
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German silver open faced deck chronometer with carrousel and power reserve indicator, circa 1912. Extremely rare calibre with carousel, made in 1st quality with diamond endstone and fine adjusting device, gold lever, gold escape wheel. White enamel dial with Arabic numerals, power reserve indicator and blued steel Breguet hands. Plain silver case, gold hinges. Dial and movement signed, case and movement with matching number. Comes with an extract from the archives.
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Diameter: 62 mm
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Weight: 176 g
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Signed: A. Lange & Söhne Glashütte B/Dresden