Probably Speyside's Finest 1966-2008 41 Year Old Douglas Laing Old Malt Cask (70cl, 50%)

A single cask Speyside single malt, distilled in 1966 and bottled in 2008 at 41 years old by Douglas Laing for their Old Malt Cask series. The casks are widely understood to have come from Glenfarclas. This one, cask 4191, was a sherry butt that yielded 326 bottles. It was bottled at 50%, the strength Douglas Laing prefers for the series, without colouring or chill filtration, in a 70cl bottle. Douglas Laing bottled around three dozen Glenfarclas sherry casks from the 1960s between 2006 and 2018.