Swiss repeating grande and petite sonnerie lever Circa 1905

Gold minute repeating two train lever clockwatch by Invar
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A very fine and very rare Swiss 18 carat gold hunting cased minute repeating grande and petite sonnerie striking two train keyless lever clockwatch, circa 1905. Frosted gilt movement, 31 jewels, two train with tandem winding, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator, striking and repeating on gongs, the repeating activated by a push-button in the band, grande sonnerie/petite sonnerie/silence lever on the edge of the bezel. Gold hinged cuvette engraved with the technical details, glazed gold rimmed cover to view the movement. Three piece white enamel dial with bold Arabic numerals, outer minute, subsidiary seconds dial and original blued steel spade hands. Solid, polished case, the front engraved with a foliate monogram. Dial and movement signed, case numbered.
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Diameter: 55 mm
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Signed: Invar La Chaux-de-Fonds
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Invar Was one of the trade names used by the firm of Achille Hirsch of La Chaux-de-Fonds. Invar was the name reserved for the best quality watches made by Hirsch.
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Grande sonnerie striking. In which both the hours and the quarters are struck at each quarter.
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Petite sonnerie striking. In which ‘ting-tang’ quarters are struck at the quarter hours, but in which the hour is only struck at the hour.