Thanks blenderm and fransodk.
Looking at pics of historical bottles from the johnniewalkerbottles site, I saw that the bottom label looked similar to those from the '70s, while the main label's font looked like it could be from either the '60s or the '80s.
But then the 86.8 proof and "1.1/5 Quart" measurement threw me for a loop.
And that led me here.
