Royal Lochnagar 20 Year Old 1991 Cask 374 - Cask Strength Collection (Signatory) Main | Front | Back 70 cl / 54.8% Scotland - Highland Single Malt Whisky 0 persons recommended this dram. Recommend it. Details Country: Scotland - Highland Distiller: Lochnagar Bottler: Signatory Alcohol: 54.8% ABV Volume: 70 cl Age: 20 years old Style: Single Malt Whisky Buy online at Buy on Master of Malt for £66.28 Reviews and ratings (See more reviews of Lochnagar) Comments about Royal Lochnagar 20 Year Old 1991 Cask 374 - Cask Strength Collection (Signatory) Did you have this bottle? Did you enjoy it? What do you think about the proposed similar bottles? Let us know.