I just helped out a neighbor and they handed me a bottle of White Horse scotch.

It's got to be about 35 years old. It has the red stamp seal on it and the top has a metal type hinge on it to open like you would see on a bottle of Grolsch. The bottle was wrapped up in paper and still had the foam packing around it. My neighbor told me he did a job for an older woman and she gave him a whole case of it.

How can I tell what vintage this bottle is?