The knives with the 15 degree off set are rather rare. I have only ever seen one example. Nice article 3T. Thanks for the post.
I have the 1986 20th Anniversary model with the 5 degree cant. I like his reason for the offset. But its unique feature was the canted blade with a 5-degree offset. The offset would allow the blade to be carried in the boot, on the hip or in the small of back without snagging and aid in concealment.