My guess was a 7 year old Mortlach, bourbon cask, 52%. It reminded me of a Mortlach or Ben Nevis due to its big fat sulphury spirit. It’s quite naked, but very characterful and I didn’t find far off of the Ben Nevis 10 year. I quite liked it; the more Benrinnes I have, the more impressed I am.
It is a very distillate forward whisky, be warned.