Chronoswiss Grand Opus Chronograph Lunar Chronograph BrandChronoswiss CollectionLunar Chronograph ModelGrand Opus Chronograph ReferenceÑÍ 7541 SR Country of originSwitzerland Type of watchMen's Case materialRose gold Case diameter41 mm Case thickness15 mm AutomaticChronographHoursMinutesSecondsDateTransparent casebackSkeletonWristwatch