Vacheron Constantin Overseas perpetual calendar ultra-thin skeleton

Vacheron Constantin's Overseas Perpetual Calendar Ultra-Thin Skeleton, reference 4300V/220G-B946, measures 41.5 mm in white gold. The case stands 8.1 mm thick, slim for a perpetual calendar. Sapphire crystal covers both the skeletonised dial and the display back, with the finish of the self-winding calibre visible from either side, identified as the 1120/3 QPSQN/1. This is a perpetual calendar, accurate to the year 2100, paired with a moon phase showing a star-studded sky under two gold moons. Hands and indices carry luminous treatment for legibility, and the movement runs on a 40 hour power reserve. A white gold bracelet closes with a folding clasp in the same metal, though the strap can be swapped for leather or rubber. The case holds a 50 metre water resistance rating.