Well, here's half an answer!
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The wording "McBain's" is clearly visible at the top of the label, but the rest is not clear.
Stewart McBain Ltd is a whisky bottler - they buy from a distillery and sell under their own name.
There is a specialist whisky shop called "L & C McBain".
Dennis McBain was a coppersmith at a distillers 50 years ago, whose recollections of working there are used in promotional material for a £9,000 bottle produced by The Balvenie.
There is also Bain's, a South African whisky brand.
The simple bottle and understated design of the label - and the fact I have looked at 100's of whisky bottles without seeing anything like it - tends to lead to the conclusion that it is possibly a "fake" brand.