Vacheron Constantin Patrimony Perpetual Calendar

About this reference

The Vacheron Constantin reference 43031 in 18k yellow gold was produced from approximately 1983 until 2002. Collectors prioritize this reference for its ultra-thin caliber 1120/1, which utilizes a Jaeger-LeCoultre 920 base movement featuring a full-sized rotor with a beryllium rail. The 36mm case design is characterized by stepped lugs and a slim profile of roughly 7.5mm. The dial typically features "sigma" markings at six o'clock, indicating the use of solid gold indices, and displays the day, date, month, and moon phase without a leap year indicator. As of 2024, secondary market prices generally range between $35,000 and $55,000 depending on condition and the presence of original accessories. A notable variant includes the skeletonized reference 43032, though the 43031 remains the foundational perpetual calendar of the brand’s post-Quartz Crisis era. One example sold at Phillips in 2023 for approximately $40,000.