Allt-a-Bhainne 25 Years Old 2000 Cask #4 (Signatory Old Gods)

Distilled in 2000 and bottled by Signatory Vintage in 2026 from single Oloroso sherry cask #4 under the Old Gods imprint, this is a 25 Years Old Allt-a-Bhainne at 52.4% ABV. The release is one of 298 bottles. Old Gods is one of Signatory's themed collection labels, sitting alongside the Cask Strength Collection as a vehicle for premium aged single casks.

Allt-a-Bhainne ferments malted barley for 48 to 50 hours on Mauri liquid yeast in closed stainless steel washbacks, then double distills through two copper wash stills and two copper spirit stills with steam heating and shell and tube condensers. The short Speyside ferment produces a clean malt forward spirit built as a blend filler for Chivas Regal, Passport and 100 Pipers. New make is reduced with Rowantree Burn water and tankered to Keith for cask filling and maturation, since the distillery holds no warehousing on site.

Oloroso sherry maturation drives the spirit through rancio chemistry, where slow polyphenol and aldehyde oxidation during prior sherry contact generates the dried fruit, leathery and nutty register typical of long sherry contact. Against the lighter Allt-a-Bhainne distillate the sherry contribution leads. Twenty five years in Oloroso pushes the cask interaction to a quarter century, with the rancio chemistry now joined by the slower deep maturity compounds that develop over extended cask contact.