Single Cask Nation Macduff - US Retail Release #12 is a 16-year-old single malt Scotch whisky from the Macduff distillery, bottled from a single cask at a robust natural strength of 56.8% ABV. For a novice drinker, that means it is likely to show a more individual character than a large standard release, with no dilution to a lower bottling strength.