Vacheron Constantin Overseas perpetual calendar ultra-thin

The Vacheron Constantin Overseas perpetual calendar ultra-thin, reference 4300V/220R-H144, measures 41.5mm in rose gold. The case is 8.1mm thick, a slim proportion for a perpetual calendar. Vacheron Constantin fits it with the self-winding calibre 1120 QP/1, bearing the Geneva Seal, and covers the golden dial with a sapphire crystal. The perpetual calendar tracks date, weekday and month over a four-year cycle, and a moon phase display sits alongside it. Hands and indices carry luminous treatment for legibility. A sapphire caseback lets the movement show through. The rose gold bracelet closes with a folding clasp in the same metal. Vacheron Constantin rates the case to 50 metres.