A single cask bottling from an undisclosed, top secret distillery. The (M) on the label suggests one particular distillery, said to be the tipple of choice for the world's most famous spy. This classic ex-sherried Speysider, celebrating its 200th anniversary, has been matured in a bonded warehouse for eighteen years in a single exOloroso sherry butt, before being bottled at natural strength. We seldom see this distillery bottled at cask strength, so make the most of this very rare opportunity to try this whisky that has a license to thrill.