Swiss gold lever with independent centre seconds Circa 1880

Gold open faced pocket watch
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A fine and unusual Swiss, two-train, 18K gold pocket watch with independent centre seconds, circa 1880. Polished bezel and band, engine-turned back cover with polished border and vacant cartouche, bolt at 9 o’clock to lock the seconds. Hinged gold cuvette. White enamel dial with radial Roman numerals, outer independent seconds track. Blued steel Breguet hands.
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A nickel movement, Geneva striping decoration, 26 jewels, gold wheel train, counterpoised straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator, independent dead seconds by means of two-flirt wheel acting on a small pinion mounted on the escape wheel arbour, independent seconds activated by a slide on the band. Pillar plate signed and numbered, cuvette numbered.
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Diameter: 48 mm
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Signed: Lucien Sandoz  Le Locle