I have one, dug from a circa 1920 dump here. This product would have been popular during prohibition, I'm sure. Would be interesting to know the alcohol content...
Was it actually made in the UK? Hughes, Morris & Co. are listed as sole importers.
I found a reference pertaining to this subject in a book called "Dr. Chase's Recipies or Information for Everyone" (Ann Arbor, Michigan, 1867) ..it reads:
"10. Porter, Ale, or Wine, to Prevent Flatness in Parts of Bottles for the Invalid.- Sick persons who are recommended to use ale, porter, or wine, and can only take a small glass at a time, nearly always find the last of the bottle flat or stale.
To prevent this put in the cork firmly, and turn the cork-end downwards, in a large tumbler or other vessel nearly filled with water.
This plan prevents communication with the external air."
Hi Mike O ..My buddy found one exactly like yours, it is I believe black glass. It was found in New Glasgow, Nova Scotia, Canada last week. My research, before I read this forum, traced it to London England. He also research it, he found an ad where it said it was a medicine. Maybe Red Matthews are give his impressions on the manufacturer's method of making.
Husband's grandmother was a staunch tea-totaling old-time Methodist but she kept a bottle of Mogan David wine in the fridge and had a glass every night. She called it her medicinal blood thinner. She would have approved of this medicinal port!