Not much to say about Invergordon that wasn't covered in the review of the younger Maltbarn release.
This was distilled in December 1972, filled into what was probably an ex-bourbon cask, and bottled in April 2015 at 46.6% without coloring or chill filtration.
Pearls of Scotland Invergordon 42 Year 1972/2015
Nose: lots of polished oak, fresh sawdust, sweet baked corn, a touch of Invergordon coconut, caramel/toffee, milk chocolate. After adding a few drops of water the sawdust takes over and pushed out the more polished oak, the coconut tucks into the oak, and the caramel is tamped down, and some vanilla comes out.
Taste: gobs of sweet oak and corn, some juicier fruit/raisin notes around the middle, then drier oak/sawdust and corn near the back. After dilution the oak gets a bit brighter but also expands across the palate and mostly washes out the fruit.
Finish: dry corn and oak, light coconut,
This is a big old oak bomb that will likely appeal to bourbon fans more than most single malt drinkers. With that said, I've had ten year old bourbons that hit a lot of the same notes for a tiny fraction of the price. Despite decades in the cask, this spirit doesn't seem to have developed much in the way of complexity. I suspect that a teenage Invergordon in a fresh oak or first-fill ex-bourbon cask would come pretty close. But that all comes with the caveat that this was a rather small sample and it's possible that I could have gotten more out of this with time and water. The folks reviewing it on WhiskyBase have a much higher opinion of it than I do.