Yalumba have been making this very style of wine since the 1850s and retain much of the nation's most precious stocks. The old and mature, dry grown vineyards of Rutherglen are ideally suited for producing harvests of the richest fruit. The grapes ripen with considerable raisining of the berries, regularly achieving over twenty degrees of baume. After many years of maturation, a selection of older and younger wines are judiciously assembled to produce a complexity and balance of fruit and aged rancio characters. An average of seven years maturation in casks of seasoned French oak imparts wonderful liqueured fruit sweetness in the final wine.