I have two bottles of Haig & Haig blended Scotch Whisky.

Each is 4/5 quart, of the dimpled pinch bottle, unopened. One has a screw cap, the other a wire closure. Both have red US Internal Revenue numbered strips over the caps.

How can I tell the age of these? I got these from my father, but have no other information. What are these worth?

I'll try to get some digital pictures here too.

Thanks,

Skeet