IWC Big Ingenieur Ingenieur BrandIWC CollectionIngenieur ModelBig Ingenieur ReferenceIW500503 Country of originSwitzerland Type of watchMen's Case materialRose gold Case diameter45.50 mm Power reserve168 hours Water resistance120 m Manual windingHoursMinutesSecondsDatePower reserve indicatorTransparent casebackWristwatch