Extremely rare Swiss gold tourbillon pocket watch Circa 1945

Gold important watch by Vacheron & Constantin
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An extremely rare and very important Swiss 18 carat gold open faced keyless pocket chronometer with a one minute tourbillon, circa 1945. Accompanied by an extract from the Geneva Observatory. A polished case with concealed hinges and a glazed gold cuvette. Silver dial with Roman hour numerals, outer minute track, subsidiary seconds and blued steel Breguet hands. Rhodium plated movement by Lecoultre, a going barrel with overwinding protection click, 20 jewels, tourbillon regulator with a three arm equidistant carriage, lateral calibrated lever escapement, anibal brass Guillaume balance with gold timing screws, Breguet balance spring and micrometric regulator with pin gap closing option. Signed on the dial, case and movement.
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Diameter: 65 mm
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Thickness: 19 mm
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Signed: Vacheron & Constantin Genève
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The present watch, adjusted by U. Brahier, was submitted to the Geneva Observatory in 1968. It was one of a special group of watches, all with tourbillon regulators and all adjusted under the direction of master adjusters E. Olivier & Brahier. The results surpassed all expectations, the first three places in 1947 were taken by Vacheron Constantin and the record was broken with 883.8 points. The record that Patek Philippe had held for 13 years, since 1934, was broken. Out of the 30 first places, Vacheron Constantin took half the prizes. All the watches were identical, extremely high grade tourbillon regulators made entirely in the factory, superbly adjusted by Olivier or Brahier, aided by the skill acquired through years of experience.