Can you pop up a picture? How do you know it is from 1966? I'm just curious as it is specific. Usually we do it by decade which is sometimes as close as we can get.
Also where you are based may have an affect on Value.
As someone born in 1966 I would love to see this. Unfortunately I have never heard of this before. FYI, I had some 1966 Port to celebrate the 50th and it was sublime. To have a 50 year old Irish whiskey would be unbelievable.