Vacheron Constantin Patrimony moon phase retrograde date

Vacheron Constantin's Patrimony moon phase retrograde date, reference 4010U/000G-B330, measures 42.5 mm in white gold. The case stands 9.7 mm thick, a slim proportion for a watch carrying a retrograde date and moon phase display. The self-winding calibre, numbered 2460 R31L/1, bears the Hallmark of Geneva and offers 40 hours of power reserve. A sapphire crystal covers the white dial, and a matching sapphire caseback lets the finishing show through. The moon phase depicts two gold moons set against a starry sky, while the retrograde hand sweeps the date across an arc rather than circling it. Central seconds round out the display. An alligator leather strap closes with a white gold pin buckle. Water resistance stays a modest 30 metres, fitting for a dress watch of this kind.