- The top is corked and wired-on, and covered with a gold-colored lead foil capsule that reads "Extra Special" in raised lettering on the top. This resembles the closures from at least 1930 until screw caps came in in the '60s. From my research, it seems that from 1943-47, many (if not all) Black Label bottles lacked the lead foil covering over the cap, and used a Kork-n-Seal cap instead of a proper cork. So, either pre-1943, post 1947, or undatable by the cork.
- The lower label says nothing about the Royal Warrant that George V granted in 1934. I know that the Royal Warrant appeared on the bottle from 1934-43, and then reappeared in 1957, under the Queen's Warrant. This bottle lacks a Warrant. So, it's either from 1944-1956, or it's possible that it predates 1934.
- The base of the bottle has "JW13" cast into it. I don't know if this correlates to the year of bottling, but it must indicate something.
- The main label lacks any mention of Canada Dry who, AFAIK, had exclusive US distribution from the end of Prohibition (1930) onward. So, it's either pre-Prohibition, or it wasn't intended for the US Market.
- There are no excise or revenue stamps, bands or labels anywhere on the bottle. This also suggests it was not intended for the US market.
The fill is good, and the bottle is in excellent condition, with small losses to the upper corners of the shoulder label being the only problems I can see.
Any help in dating the bottle would be greatly appreciated! -and, of course, if anyone wanted to venture a guess as to its value, that would be nice too.