Vacheron Constantin Overseas perpetual calendar ultra-thin

The Overseas perpetual calendar ultra-thin, reference 4300V/220G-H151, is fitted with a 41.5mm round white gold case and a sapphire crystal. The burgundy dial displays a perpetual calendar with date, month, year and moon phase functions, driven by the automatic Vacheron Constantin calibre 1120 QP/1. The movement carries the Poinçon de Genève, a hallmark introduced by the Republic and Canton of Geneva in 1886 to certify the quality and craftsmanship of watches produced in the city.