Graham's 40 Years Old is made from wines of the very highest quality which, following careful selection, are matured in seasoned oak casks of 534 litres until their peak of maturity is reached. These are among the most demanding and challenging styles of Port to produce requiring great skill and years of experience from the winemaker and blender. It is essential to strike the correct balance between the delicacy and elegance which results from prolonged cask ageing while retaining the fruit quality which lends this old Tawny its structure and longevity.