Swiss gold grande and petite sonnerie pocket watch Circa 1900

Gold watch retailed by Hauser Zivy & Cie
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An extremely rare Swiss, 18K yellow gold hunting cased chronometer clockwatch, circa 1900. With trip minute repeating, two-train, grande and petite sonnerie. Bulletin de l’Observatoire obtained at the Observatory of Neuchatel in 1902. Retailed by Hauser Zivy & Cie., Mexico-Paris, La Esmeralda. A polished case with an engine-turned back. Hinged gold cuvette engraved with the technical and retail details highlighted with blue, white and black enamel. White enamel dial, three-piece with narrow radial Roman numerals, subsidiary seconds and black steel pear hands.
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Rhodium-plated movement, Geneva striping decoration, twin barrels with differential tandem winding, 36 jewels, three in screwed chatons, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring with overcoil and swan-neck micrometre regulator, striking and repeating on gongs using a trip slide on the band, sonnerie/silence and petite sonnerie/grande sonnerie selection levers under the bezel. Dial and cuvette signed for the retailer.
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Diameter: 57 mm
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Thickness: 16 mm
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Signed: No Name
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Any complication such as a striking train affects the timekeeping of a watch meaning that watches with striking, repeating or chronographs were not usually submitted for observatory trial, certainly a clockwatch would not normally be considered to be a precision watch. However, this watch was awarded a certificate from the OBSERVATORY OF NEUCHÂTEL and as such is extremely rare.