Vacheron Constantin Traditionnelle perpetual calendar ultra-thin

Vacheron Constantin's Traditionnelle perpetual calendar ultra-thin, reference 4300T/000R-H107, measures 36.5 mm across in rose gold. The case stands 8.43 mm thick, slim for a watch carrying this much mechanical information. A sapphire crystal covers the silver dial, and a matching crystal caseback reveals the movement below. Inside is the self-winding calibre 1120 QP, finished to the Geneva Seal and delivering 40 hours of power reserve. The perpetual calendar tracks day, date, month and leap year across a four-year cycle, paired with a moon phase display. An alligator leather strap closes with a rose gold pin buckle. Water resistance is modest at 30 metres, in keeping with a dress watch of this kind.