Glendronach 33 Year Old Oloroso Puncheon 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 1978 and matured for 33 years in a single ex-oloroso Sherry puncheon before being bottled at a natural cask strength of 52.9%.