According to brand literature, it's a blend of "one butt of Bunnahabhain 1987, one hogshead of Bunna Moine 2007, Mortlach 1997 and Bunnahabhain 1988, two hogsheads of Westport 1996, and three butts of a 2007 blended malt comprised of Bunnahabhain, Glenallachie, Glenfarclas, Glengoyne and Tamdhu."