Vacheron Constantin Patrimony Perpetual Calendar Ultra-Thin Watch, 41mm Silver Dial, 43175/000R-9687

An elegant interpretation of the perpetual calendar, this 18K pink gold watch houses an ultra-slim automatic movement, just 4.05 millimeters thick, which will keep perfect time until 2100. The moon phase features a star-studded sky and two gold moons. Its openworked caseback reveals the exceptional hand-finished details of the self-winding mechanical movement.