Glendullan 23 Years Old Rare Malts Selection 1972 is a limited-edition single malt from the Speyside distillery Glendullan, released as part of United Distillers’ (later Diageo) Rare Malts Selection. The whisky was distilled in 1972 and matured for 23 years. It was bottled in 1996 at a cask strength of 62.43%. Glendullan is a distillery in Dufftown, in the heart of Speyside. It was founded by the blending company William Williams & Sons in 1897, during the golden age of Scotch whisky. In 1972, a new distillery was constructed next to the old one. They worked in tandem until 1985, when the original distillery closed.