Swiss two train independent centre seconds lever Circa 1860

With two time zones and 1/4th second diablotine attributed to Charles E. Jacot
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A fine and rare Swiss 18 carat gold hunting cased two train independent centre seconds lever pocket watch with two time zones and quarter-second diablotine, circa 1860. Retailed by Denis Bros., Melbourne, Australia. Nickel-plated movement, 17 jewels, two going barrels, counterpoised lateral lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator, independent centre seconds and quarter-second diablotine activated by a slide in the band. Hinged gold cuvette. White enamel dial, two meantime dials with Roman numerals, outer minute track, outermost seconds divided into fifths, subsidiary quarter-second jumping diablotine and original blued steel pear hands. Engine-turned case with polished borders and band. Movement signed by retailer.
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Diameter: 55 mm
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Signed: Denis Bros. Melbourne
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The feature known as a diablotine is a small subsidiary dial on a chronograph or independent centre seconds pocket watch, the hand of which moves in a jumping manner at intervals of 1/4 or 1/5th of a second. The term means ‘little devil’. The diablotine is halted when the chronograph or centre seconds is stopped, and the fractions of a second can be read.