I bought those cases of 1983 Pichon Lalande in the mid to late 80's; they were not futures, but all four cases were in the wood and appeared unblemished. Since that time, they have been stored in my cellar at 55 degrees. Two of the four cases are gone, and now I have opened the third case! This is like losing an old friend!
Las Cases is one of my very favorites, and it will age better than Pichon Lalande. How long have you had that bottle in your control?