Vacheron Constantin Overseas perpetual calendar ultra-thin

Vacheron Constantin's Overseas perpetual calendar ultra-thin, reference 4300V/220G-B945, has a white gold case measuring 41.5 mm across and just 8.1 mm thick. The sapphire crystal covers a blue sunburst dial with gold hour markers and hands, both highlighted with luminous treatment. Inside is the self-winding calibre 1120 QP/1, certified with the Geneva Seal and finished to a standard visible through the sapphire display back. The watch is a perpetual calendar, tracking day, date, month and leap year without correction until 2100, and it carries a moon phase with a starry sky rendered in gold. Power reserve runs to 40 hours. It is fitted to a white gold bracelet closed by a folding clasp in the same metal. The case holds a 50 metre water resistance rating.