Max Schubert retired as Chief Winemaker at Penfolds, but remained involved as a mentor and Winemaker Emeritus for another 20 vintages. Don Ditter, an early graduate of Roseworthy Agricultural College who joined Penfolds as a laboratory assistant in 1946, was appointed by Max Schubert as his successor. An era of considerable technical advances in winemaking, producing a succession of memorable editions up until Don Ditter's Last vintage before retirement, epitomize this remarkable period. Fom the Kalimna and other Barossa vineyards, and the Coonawarra. A cool summer followed by a mild, dry vintage. Maturation for eighteen months in new American oak hogsheads. Alcohol 13.40% Acidity 5%80g/L pH 3.85%