Nice Root.
But not sure if it is all that old.
From what I can see of the root neck it looks to be less than 10 years old.
Here is a image of a root that is in the 25 year old range showing the root scars which you can fairly easily count to get real close to the age of the root.
Sounds like you had a wonderful Granpa there.
Best of luck this year !
TNhunter