Vacheron Constantin Traditionnelle perpetual calendar ultra-thin

Vacheron Constantin's Traditionnelle perpetual calendar ultra-thin, reference 4300T/000G-H106, is a 36.5 mm white gold watch. The case measures 8.43 mm thick, slim enough to justify the "ultra-thin" name. It runs on the self-winding calibre 1120 QP, carrying the Hallmark of Geneva and visible through a sapphire display back. The silver dial sits under a sapphire crystal and shows a perpetual calendar with date, weekday, month and moon phase, a genuine four-year calendar rather than a simplified version. Power reserve stands at 40 hours. The watch is fitted to an alligator leather strap closed with a white gold pin buckle. Water resistance is a modest 30 metres, in keeping with its dress-watch proportions.