Trying to identify when this brandy was made, any help would be greatly appreciated!

I received this bottle of brandy for free from my girlfriend’s grandparents, they’re moving to a new house and found this in a cabinet. Nobody could remember when they bought it and it doesn’t look like modern Christian Brothers bottles, so I have a feeling it might be pretty old. I think it may have been opened before but it doesn’t have a safety seal indicator thing on it (you know, the thing that cracks when you open a bottle), which is another reason I’m thinking it’s an old bottle.

I only had brandy one other time, a couple years ago, but I thought this one tastes really good!