Palo Cortado Sherry Casks Matured Whiskies

“Palo Cortado is a rare variety of sherry that is initially aged under flor to become a fino or amontillado, but inexplicably loses its veil of flor and begins aging oxidatively as an oloroso. The result is a wine with some of the richness of oloroso and some of the crispness of amontillado. Only about 1–2% of the grapes pressed for sherry naturally develop into palo cortado.” - Wikipedia