Vacheron Constantin Traditionnelle complete calendar openface

Vacheron Constantin's Traditionnelle complete calendar openface, reference 4020T/000P-H038, measures 41 mm across in platinum. The case stands 11.05 mm thick and carries a sapphire crystal over a silver dial hand-guilloché with a Maltese cross pattern to mark the Maison's 270th anniversary. Inside is the self-winding calibre 2460 QCL/270, bearing the Hallmark of Geneva, with 40 hours of power reserve and a display back. The dial shows a complete calendar with month, weekday and date alongside a moon phase and central seconds. This is a limited edition, one of 370 pieces made. The alligator leather strap closes with a platinum folding clasp. Water resistance is a modest 30 metres, in keeping with a dress watch of this kind.