 The journey of this vintage began on 29 October 1979, when the spirit was put into bespoke bourbon barrels.After a 29-year maturation, it was transferred to Matusalem oloroso sherry butts from Jerez de la Frontera for the final two years.After an initial period of 22 years in American white oak ex-bourbon casks, the 1981 Matusalem is aged for six years in Matusalem oloroso sherry butts from Gonzalez Byass.