Auchentoshan 1987 individual cask bottling
Distilled 1987 - 17y - sherry butt 1659
Exclusively for Belgium 

From a single sherry butt, distilled 02.12.87 - 61,5%

I think the cask was filled with a higher alcohol percentage than the standard 63,5%, which is pretty easy with a middle cut of 81% (being triple distilled)

scores
whiskybase – 88/24
malt maniacs - no score
serge valentin - no score