Wildlife Department Biologists offer to age your harvested deers jawbone. I have submitted a few through the years. It is free and doesn't take a lot of work. Would anyone be interested in a little competition for the oldest?
https://www.wildlifedepartment.com/node/add/how-old-was-my-harvested-deer-
https://www.wildlifedepartment.com/node/add/how-old-was-my-harvested-deer-