John Haig "Dimple" Bottle
Thank you Walter for all the information. I guess that just about ties it down, and I'm very happy about that as it has bugged me for some years now. Giuseppe Bognoni from Whisky Paradise has been in touch and has expressed an interest in buying it for his private collection.
Two small points remain,
1) Which market did the finished product sell into? Bearing in mind this was partly in the Prohibition era and also the overwhelming preponderance of Haig's "Pinch" and "Gold Label"
2) I make the assumption that the liquid in my bottle is not necessarily whisky as coloured water would do just as well for a "mock-up".