Swiss 18k gold half hunting cased keyless watch Circa 1911

Gold half hunting lever watch
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A fine and unusual, 18K gold Swiss, half-hunting cased keyless pocket watch, circa 1911. Polished and matted, hinged and sprung front cover with glazed aperture and blue champlevé enamel radial Roman numerals, inner minute track, the back cover decorated with a portrait bust of a gentleman in relief surrounded by a wreath of oak leaves.

Hinged gold cuvette. White enamel dial with radial Roman numerals, outer minute track, subsidiary seconds. Gold Spade hands. Frosted gilt movement, 15 jewels, straight line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator. Dial, case, cuvette and movement signed.
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Diameter: 50 mm
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Signed: Vacheron & Constantin  Geneve