This precious whiskey was originally laid down back in 1975 in bourbon casks with an eye on the millennium. Private investors were invited to purchase entire casks of the stuff long before it was bottled. What resulted is the longest aged Bushmills whiskey available. It has matured very well. Each cask was bottled unfiltered and taken down to 43% abv, with the label bearing the name of the cask owner, or whatever else they wanted to put on it.