Swiss gold chronometer with one-minute tourbillon Circa 1900

Gold deck watch with pivoted detent escapement
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An important heavy Swiss 18 carat gold keyless deck Chronometer, circa 1900. With one-minute tourbillon, detent escapement in original fitted three-body mahogany box. Accompanied by a 1908 Bulletin de Marche from the Observatoire Astronomique et Chronométrique de Neuchâtel and the original certificate with the original envelope. Grand Prix Exposition Universelle, Paris. A solid and heavy case, polished mastermark P.D. Hinged gold cuvette with engraved dedication ”ce Chronometer de bord No22311 construit par Paul Ditisheim la Chaux de Fonds a obtenu en premiere classe le premier prix de l’etat a l’observatoire astronomique de Neuchatelle”. Over-hinged glazed gold bezel for viewing the movement.
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Matte silver dial with champlevé radial Roman numerals and outer minute track, subsidiary dial, subsidiary seconds, engraved in red Grand Prix Paris 1900. Blued steel fleur-de-lis hands. Rhodium-plated movement, Geneva striping decoration, 18 jewels, one-minute tourbillon, three equidistant arm polished steel cage and bridge, tourbillon with pivoted detent escapement, Guillaume cut anibal-brass compensation balance with winged arms, adjusted to heat, cold, isochronism and five positions, 18 gold peripheral temperature adjustment screws, blued steel Breguet balance spring, index regulator.
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Diameter: 60 mm
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Thickness: 18 mm
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Signed: Paul Ditisheim  Chaux-de-Fonds
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Paul DitisHeim (1868-1945) Started manufacturing at Chaux-de-Fonds in 1892, specializing in very high precision and jewelled watches. Success in both spheres followed rapidly, and he won many honours. He collaborated with Dr CH. E. Guillaume uses both the Guillaume integral balance and the elinvar-type of auto-compensating balance spring. He also contributed many papers to scientific and horological journals.