Sherried Longmorn from the early 70’s by G&M.
Longmorn 1971-2008 Gordon & MacPhail. 700ml, 43%
Although Longmorn today falls under ownership of the Chivas Brothers, it was founded by a man names John Duff, former manager of the Glendronach distillery. It’s therefore perhaps not totally surprising that like Glendronach, Longmorn is appreciated for their superb sherry maturations!