Vacheron Constantin Traditionnelle complete calendar openface

The Traditionnelle complete calendar openface (reference 4020T/000P-H038) is part of Vacheron Constantin's Traditionnelle collection. It has a 41mm round platinum case with a silver dial and sapphire crystal, and it bears the Poinçon de Genève, the hallmark established by the Republic and Canton of Geneva in 1886 to certify watchmaking quality and provenance. The watch is powered by the automatic calibre 2460 QCL/2 and displays date, weekday, month and moon phase, with a sapphire display back revealing the movement.