I've been digging trough some photos of bottles of Jameson and found a couple of bottles that are easier to date I believe. When they are compared to the bottle above they look much newer. I'm more certain that that's an early Red Seal bottle. The font on the red seal is different too.
I've attached various examples from the late 70's to 80's.
- JamesonNAS2.JPG (183.08 KiB) Viewed 483 times
The one that says Red Seal Whiskey, center bottle of 5, is from the 70's. The AVB is 70 proof.
- JamesonNAS1.JPG (183.35 KiB) Viewed 483 times
The one in the center of 3 bottles is a little later as it states both 70 proof and 40%.I think proof was removed from bottles in Ireland in 1980.
There's an Italian bottle to the right of that bottle that's from the 80's. These would have been labeled in Dublin.