A small mom and pop grocery store recently went out of business not too far from where I live. The owner, a man in his mid-70s, had found a number of old liquor bottles in a nearby storage shed. None of the bottles was opened. Of particular interest were two bottles of VAT 69 black label scotch. Instead of having normal screw type closures, each bottle had what looked like a typical soda (Coke, Pepsi) bottle top with a levered pigtail, much like you'd find on a Grolsch bottle. I purchased both bottles and immediately began to search for a production date, but no date could be found on the label or the bottom of the bottle. The scotch itself was very smooth...much better than typical blended scotches.
Would anyone have a clue as to when the type of closure described might have been used?