Vacheron Constantin Patrimony moon phase retrograde date

The Patrimony moon phase retrograde date, reference 4010U/000R-H117, is a 42.5mm round case in rose gold with a white dial and sapphire crystal. It carries the Poinçon de Genève, the hallmark introduced by the Republic and Canton of Geneva in 1886 to certify watchmaking quality and craftsmanship. The automatic calibre 2460 R31L provides moon phase and retrograde date functions with a 40-hour power reserve. Water resistance is rated to 30 metres.