Swiss split-seconds chronograph with diablotine Circa 1870

Gold split-seconds lever chronograph with 1/4th second diablotine by F. Guédin
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A very fine, rare and heavy Swiss 18 carat gold hunting cased keyless lever pocket watch with two train independent split-seconds chronograph and 1/4th second diablotine, circa 1870. Nickel movement, 30 jewels, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, tandem winding, heart piece on the back plate. Hinged gold cuvette. White enamel dial with narrow Roman numerals, outer minute track, outermost seconds divided into quarters, subsidiary quarter-second jump diablotine and blued steel Breguet hands. Case engine turned and polished to both sides, reeded band. Dial, cuvette and movement signed.
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Diameter: 56 mm
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Signed: F. Guédin Geneva
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Diablotine. 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 jumpingmanner at intervals of 1/4 or 1/5th of a second. The term literally means ‘little devil’. The diablotine is halted when the chronograph or centre seconds is stopped and the fractions of a seconds can be read.