vacheron constantin patrimony contemporaine retrograde day date 18kt white gold 42.50mm men's watch

42.50mm 18K white gold case, transparent sapphire glass back, silvered opaline dial, self-winding 2460 R31 R7 movement with hours, minutes, retrograde calendar, hand-type calendar, day of the week, and retrograde day of the week indications, approximately 40 hours of power reserve, Mississippi alligator strap with diamond-set folding buckle. Water resistant to 30 meters.