Mortlach Single Malt Scotch Cowie's Blue Seal 20 Yr 86.8 750 MLMortlach Single Malt Scotch Cowie's Blue Seal 20 Yr 86. 8 750 ML is a rare Speyside masterpiece aged for twenty years to deliver unmatched depth, richness, and complexity. This Mortlach Single Malt Scotch Cowie's Blue Seal 20 Yr 86. 8 750 ML showcases Mortlachs signature Beast of Dufftown character with bold malt, robust oak, and refined sherry influences. Perfect for collectors and connoisseurs, Mortlach Single Malt Scotch Cowie's Blue Seal 20 Yr 86.