Swiss 18K gold minute repeating astronomical watch Circa 1910

Gold complicated full hunting watch 
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A very fine and very rare Swiss, 18K yellow gold astronomical, hunting cased, keyless, minute repeating pocket chronometer, circa 1910. With a triple date calendar and moon phase. A massive, polished case, the front cover with an engraved dedication. Hinged gold cuvette. White enamel dial with Breguet numerals, outer minute track, subsidiary dials for the days of the week, the months and the date with concentric seconds, moon phase aperture. Gold spade hands. A frosted gilt movement, 32 jewels, wolf’s tooth winding, counterpoised straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, swan-neck micrometre regulator, repeating on gongs activated by a slide on the band. Case, cuvette and movement signed.
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Diameter: 53 mm
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Signed: Vacheron & Constantin  Genève
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The more complicated a timepiece is the more difficult it is to adjust, as the additional wheelwork affects the timepiece’s functioning because of the amount of energy required-but often only sporadically. It is therefore very rare to find a complicated timepiece that was submitted to Observatory control.