Extremely rare German highly complicated lever Circa 1911

Minute repeater with perpetual calendar and moon phase by A.Lange & Söhne
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An important, very fine and extremely rare Glashütte 18 carat pink gold hunting cased minute repeating pocket watch with perpetual calendar and moon phase, circa 1911. Sold in 1911 for 2258 marks. Glazed, frosted, gilt 3/4 plate movement, screwed gold chatons, two hammers, two gongs, gold screwed compensation balance, very finely engraved balance cock, index spring fine adjusting device, gold lever and escape wheel, chatoned diamond endstone on balance. Gold cuvette. White enamel dial with Arabic Empire numerals, auxiliary seconds, inserted day, date and month indicator with leap year compensation, cobalt blue enamelled moon phase disc with inlaid golden stars and moon, gold Louis XV hands. Plain à goutte case, polished, engraved monogram, Louis XV design.
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Diameter: 57 mm
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Weight: 182 g
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Signed: A. Lange & Söhne Glashütte B/Dresden
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Only eight examples of this highly complicated watches were produced by Lange & Söhne manufactured in quality 1A.