Glendronach 39 Year Old Oloroso Butt Single Cask is an age-statement, single-cask Highland single malt whisky produced at the Glendronach Distillery in Aberdeenshire. This single-cask release from Glendronach was distilled in 1972 and matured for 39 years in a single ex-oloroso Sherry butt before being bottled at a natural cask strength of 49.9%.