Vacheron Constantin Overseas perpetual calendar ultra-thin

The Overseas Perpetual Calendar Ultra-Thin, reference 4300V/220R-B064, is a round 41.5mm rose gold model with a white dial and sapphire crystal. It houses the automatic Vacheron Constantin calibre 1120 QP/1, which drives a perpetual calendar with date, month, year and moon phase displays. The movement carries the Poinçon de Genève, a quality hallmark introduced by the Republic and Canton of Geneva in 1886 to certify craftsmanship and reliability in fine watchmaking.