What a dram! This massively rare expression has been released as part of Signatory Vintage's Cask Strength Collection - the Glen Grant 50 Year Old, distilled way back in 1966. After spending an impressive half a century slumbering in a single sherry hogshead cask, this beauty was bottled at a formidable cask strength of 54.6% abv. A total of only 108 bottles are in existance.