Rare Swiss 18K rose gold long lever keyless watch Circa 1894

Rose gold hunting cased keyless lever by Jules Jürgensen
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A very fine and rare 18 carat rose gold hunting cased keyless pocket watch with long lever and Jürgensen’s patented winding and hand-setting mechanism made in Switzerland in 1894. Nickel-silver bridge calibre movement, 17 jewels including 5 in screw-mounted gold chatons, straight-line long lever escapement, cut bimetallic compensation balance with gold screws, blued steel Breguet balance spring, index regulator with main divisions set on the centre bridge. Hinged glazed gold cuvette to view movement. White enamel dial with Roman numerals, outer minute track, sunk subsidiary seconds dial and original blued steel Breguet hands. Solid case, polished, back cover engraved inside with dedication. Dial, case and movement signed. Accompanied by the original fitted box, certificate and spare parts.
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Diameter: 56 mm
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Signed: Jules Jürgensen Copenhagen
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Jürgensen’s patent lever escapement features a long pallet fork, which allows for a larger balance wheel, resulting in a more constant rate of oscillation and consequently, greater precision.
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Jules Frédéric Jürgensen (1808-1877), the son of Urban Jürgensen, Jules was born in Le Locle but moved with his parents to Denmark as a child. In 1830, after his father’s death, the company was taken over by Jules and his brother Louis Urban. In 1833, Jules returned to Le Locle and built up a great business, which was continued by his brother and in 1886 was sold to one of the employees, H. Kiens. Jürgensen was considered to be one of the best watchmakers working in Switzerland. He stamped most of his watches on the pillar plate under the dial: Jules Jürgensen of Copenhagen.