Arran Signature Series Vol. 3, "Duero Discovery" 2025. The Duero Discovery was initially matured for 6 years in 1st & 2nd fill bourbon barrels and then transferred into 1st fill Spanish Red Wine casks and matured in the dunnage warehouse number 4 under the watchful eye of Distillery Manager Stewart Bowman for a further 6 years .. Orders via eMail: erik@hirschenbrunner.com