The flagship of Graham's old Tawnies is the Over Forty Years Old. This rich and powerful old Port is the truly superb result of a lifetime's care and attention. It is available only in very limited quantities. During their long maturing period in oak casks, Old Tawnies undergo subtle color changes. The deep red hue which characterizes a Port's purple infancy gradually gives way to a paler red. It then becomes amber paler still and eventually takes on a delicate brown, orange tinted color.