An important and extremely rare wristwatch in practically new condition, with visible tourbillon and 36h power reserve indicator. This watch is one of only 106 limited pieces made in 18k yellow gold - with original box, operating instructions, blank guarantee certificate and book "The Pour le Mérite, A. Lange & Söhne Collection Tranche A Deluxe Edition by Peter Chong, limited edition 65/150, date: 12 July 2011". In November 2019 the watch was given a general overhaul by A. Lange & Söhne. Case: 18k gold, sapphire glass screwed on back, "Lange" 18k gold buckle. Dial: solid silver, argenté, Arabic numerals, auxiliary seconds at "9", 36h power reserve indicator at "3", window for tourbillon cage, blued alpha hands. Movm.: 2/3 plate movement, "fausses côtes" decoration, engraved, chain/fusee, stepped planetary gearing, finely executed steel tourbillon cage, Glucydur screw balance, diamond endstone for balance on the front and back side. Because of its impressive technical features and its esthetical appeal this tourbillon chronometer is the most prestigious of all wristwatches produced by A. Lange & Söhne, representing the culmination of over 150 years experience in the production of high quality precision timepieces. This is the only wristwatch with tourbillon known to us produced today utilizing power equalization with chain and fusee. The tourbillon cage weights less than half a gram and measures just 12.3 mm in diameter, comprising itself 76 components. The planetary transmission gear, compensating for the decreasing power of the mainspring, is built into a miniature cone and comprises 38 separate parts. The tourbillon "Pour le Mérite" was produced in limited edition: 149 pieces in 18k gold, 50 in platinum and 1 in stainless steel. Out of the 149 in 18k gold, 106 were produced in yellow gold, 24 in pink gold and 19 in white gold.
Case: very good. Dial: as new. Movm.: as new, capable of running.

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