Vacheron Constantin Patrimony moon phase retrograde date

The Patrimony moon phase retrograde date (reference 4010U/000G-H057) is a 42.5mm round white gold case with a white dial and sapphire crystal. It houses the automatic Vacheron Constantin calibre 2460 R31L, offering 40 hours of power reserve and bearing the Poinçon de Genève, a hallmark established by the Republic and Canton of Geneva in 1886. The movement drives moon phase and retrograde date functions. The case is water resistant to 30 meters.