There’s probably not enough value to be worth the hassle. To get top dollar you need to find an interested Crown collector, sell to them, and probably ship. Selling without a license is generally illegal as is shipping without a license. There are auction houses that sell liquor but many of them don’t have a clue as to what they sell and offer appraisals based on some voodoo only they know. The auction houses with a better clue are in the UK but rather generic Crown even as old as the bottle is is something out of their wheelhouse. I’d drink it with the old man and offer drinks to guests.