Swiss 18k gold hunting cased lever chronograph Circa 1915

Gold chronograph with semi instantaneous 15 minute register by Omega
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A fine and rare Swiss 18 carat gold hunting cased keyless lever chronograph pocket watch with semi instantaneous 15 minute register, circa 1915. Frosted gilt 3/4 plate movement, 19 jewels, straight-line lever escapement, cut bimetallic compensation balance with Breguet balance spring, index regulator, visible chronograph work on the back plate. Gold hinged cuvette engraved with exhibition prize medals. White enamel dial with bold Roman numerals, outer minute track and outermost seconds divisions divided into fifths, 15 minute register and constant seconds, original gold spade hands. Polished case. Dial, case, cuvette and movement signed, case numbered.
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Diameter: 54 mm
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Signed: Omega Importé de Suisse