I will have a dig around as I remember posting about the Glenfarclas QC quite some months ago, but Laphroaig did a great job of marketing QC, albeit "Finished" in QC for something like 7 months.
The Glenfarclas has been matured exclusively in Quarter Casks and the article I found at the time explained how the SMWS began by someone visitng Glenfarclas distillery and seeing some small casks (QC's) in the corner of a warehouse and enquiring what they were. It turned out that they had always been used for the "Private" drams for the local Gentry.
Said chappie bought one, shared it with friends and the rest, as they say, is history.
This particular QC is a limited edition of only 1299 bottles, it comes not in a box, but in a straw condom (for want of a better term) and is absolutely wonderful, so long as you like full-flavoured whisky tasting of old oak, old books, leather, an old English study and of course, sherry!
there are just a few left from whence those last ones came, but not many.