Macallan Exceptional Single Cask 9/2018. From an American Oak Sherry cask, this Exceptional Single Cask from The Macallan is 2018, cask 9 ( #3890). This is vintage 1988, aged for 30 years, and finally bottled at natural cask strength of 51.7% abv. As compared to the regular 30-year-old, this single cask represents one of the best single casks Macallan has to offer. Only 130 such bottles exist for this making it truly a rare unicorn in the ESC range.