I used to pass this place regularly in the 60's when I was a schoolboy, because it was on the #13 bus route, that being the bus I jumped on to visit my grandparents.The Glen Lyon was located at 231 Clepington Road to be precise, and the ad is dated 1968.
By the time I reached drinking age in the mid 70's, it had changed to The Ambassador, so I never did get a wee keek inside it!
Now it's The Centenary Bar.