Vacheron Constantin Traditionnelle perpetual calendar ultra-thin

The Traditionnelle perpetual calendar ultra-thin, reference 4305T/000R-B947, is fitted with a 36.5mm round rose gold case and a white dial protected by a sapphire crystal. It is powered by the automatic Vacheron Constantin calibre 1120 QP, which drives a perpetual calendar with date, month and year indications alongside a moon phase display, visible also through a sapphire display back. The piece carries the Poinçon de Genève, a hallmark introduced by the Republic and Canton of Geneva in 1886 to certify the quality and origin of fine watchmaking produced in the region.