Swiss 18K gold minute repeating keyless pocket watch Circa 1900

Gold hunting cased lever 
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A Swiss 18 carat yellow gold minute repeating hunting cased keyless pocket watch made by LeCoultre & Cie in Vallée de Joux, circa 1900. The cover and case back are polished. Minute repeater by two hammers on two steel gongs, activated by the slide located on the case band at 6 o’clock. White enamel dial with suspended Breguet numerals, outer minute track, subsidiary seconds at 6 and gilded metal Spade hands.
A gilded brass movements, going barrel, straight line lever escapement, cut bimetallic compensated balance with gold poising screws and blued steel hairspring with terminal curve, polished steel index regulator, repeater work on the main plate, under the dial, with silent centrifugal force governor to regulate the speed of the repetition mechanism. Signature on the movement, under the hammer.
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Diameter: 54 mm
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Weight: 108 g
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Signed: LeCoultre & Cie. Vallée de Joux
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Accompanied by a copy of the invention patent.
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Movement based on the Swiss invention patent No. 15 833, delivered on January 7, 1898, to Ditisheim & Cie, La Chaux-de-Fonds, for a “Frein-régulateur pour mécanisme d’horlogerie”.