Vacheron Constantin Traditionnelle perpetual calendar chronograph

The Traditionnelle perpetual calendar chronograph, reference 5000T/000P-B975, is housed in a 43mm round platinum case with a sapphire crystal and display back. The salmon dial displays a chronograph, perpetual calendar with moon phase, date, weekday, month and year indications, and small seconds. It is powered by the automatic Vacheron Constantin calibre 1142 QP and carries the Poinçon de Genève, a hallmark introduced by the Republic and Canton of Geneva in 1886 to certify watchmaking quality and provenance.