?Jaguar?s 2012 XKR-S Duo: The pinnacle of British exclusivity? I would be willing to bet the Queen?s castle that Sir William Lyons never imagined that his automotive creation would reach the level of exclusivity and performance capability that is represented by the extremely limited production 2012 Jaguar XKR-S Coupe and Convertible. Only 25 XKR-S Convertibles…