Even though it's not that old, it's still considered vintage. The value is in the information and knowledge it will bring to you.
I'm from a very old clan; Campbell of Argyll, and have always told people that my father was like the Kunta Kinta of Scotland, in that he LOVED to talk about our ancestry and make sure that we knew what our history was!
Enjoy your item, and any more research you do on the ancient clans. Super interesting reading!