I'm a history nerd (even majored in it - my specialities are 19th and early 20th century US, Latin America, and colonial and postcolonial Africa), so the opportunity to taste a piece of history like the 1940 Haig King George V is right up my alley.
The whiskey is, fortunately, quite enjoyable beyond its historical appeal. The nose is sweet and malty, honeyed cereal and fruit with a nice whiff of smoke kicking about. The palate lines up with the nose; sweet, a little fruity, and just enough smoke to remind you that this is scotch. It's hard not to enjoy on its own merits, but given its age, this becomes a special dram indeed - thanks to @PBMichiganWolverine