Swiss 18k yellow gold hunting cased lever pocket watch Circa 1912

Gold hunting cased so-called the Imperator
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A very fine and rare, large Swiss, hunting cased, keyless, 18K yellow gold pocket watch, circa 1912. The Imperator by Vacheron & Constantin, Geneve. The front cover with a finely engraved foliate monogram. A solid, frosted, hinged gold cuvette. White enamel dial with bold-painted Paris numerals, outer minute track, large subsidiary seconds dial. Gold spade hands. A frosted gilt movement, 18 jewels, wolf’s tooth winding, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator. Dial, case and movement signed.
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Diameter: 57 mm
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Signed: Vacheron & Constantin  Genève
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The name Imperator was never used officially but only appeared on Vacheron & Constantin documents. Its production lasted from 1898 to 1919. The Imperator was designed as a robust impermeable watch, 98% of which were hunting cases.