Auchroisk '75 circa '90
Auchroisk whisky was launched and sold under the name The Singleton in 1986 due to it being fairly difficult to read and pronounce (say it like "OH-thrusk", so pretty much not how it's spelt at all). The Singleton is now used for other Diageo whiskies, although now Auchroisk whisky is just called Auchroisk, despite it still being pretty difficult to say.
This bottling of The Singleton of Auchroisk was distilled in 1975 and matured until circa 1990, when it was bottled. A very rare collector's item.