Dow’s Late Bottled Vintage Port is a wine of a single year but it is not a “declared” Vintage Port. Whereas Vintage Port spends only two years in oak cask and then matures in bottle, LBV is aged in seasoned oak casks and then bottled, when it is between four and six years old. At the time of bottling, Dow’s LBV has completed its maturation and is ready for drinking without the need for decanting.