The oldest of the sweet wines I tried this time was the 1958 Don PX Convento Selección, a very complex and nuanced wine with notes of charred wood, tar, coal, bitter dark chocolate, licorice, roasted coffee beans and aromatic herbs. The palate is compact with no fissures and a bitterness that compensates the sweetness (it has 350 grams of sugar, so it's not a surprise that it doesn't feel as sweet as others). It's relatively dense, complex, rare and unique. They expect to produce 14,200 bottles of this elixir.