Glenrothes 21 Years Old 1996 Cask #15131 + 15132 (Signatory)

Casks 15131 and 15132 form a twin cask vatting within Signatory Vintage's 1996 Glenrothes filling, with the firm vatting sequential casks to produce a single release at meaningful volume while preserving cask character. This Glenrothes 21 Years Old, distilled in 1996 and bottled in 2018 at 51% from casks 15131 and 15132, runs to 336 bottles released into European markets under the Cask Strength Collection.

Twenty one years in refill bourbon casks produces a profile fundamentally led by distillery character. The casks' first fill activity exhausted under previous tenancy, the wood contributes through accumulated secondary chemistry: lignin's slow breakdown delivers syringaldehyde and vanillin at attenuated levels, lactones produce coconut and creamy oak through cumulative contact, and ellagitannins build structure gradually. The 51% strength reflects measured warehousing across both casks.

On the nose, honeyed barley sits with vanilla pod, fresh apple and beeswax, the casks' gentle second life contribution clearly framing the spirit. A faint yeasty note signals preserved spirit chemistry from long cask interaction. The palate moves through cooked pear, lemon curd and a clean toasted oak undertone, with 51% strength delivering distillery character without harshness. The finish is long and softly drying, the cask's diminished tannin signature giving the spirit's preserved Speyside fruit clear room to express.