some charity shop you have

my opinion is not a cordial - the bowls of which are often buckets or funnels and much smaller than this one, usually, and sitting on long stems.
this bowl shape is similar to those described as mead or low champagne, but the overall height of this one seems almost too short for those, so might just be a small goblet or wine glass.
Believe the folded foot made a reappearance, in the U.K., around the 1820 - 30 period (George IV) - although unsure if this also applies to Continental drinking glasses for the same period - and impossible to be sure of the origin of this one.
For Britain, the Georgian period spans the years 1714 to 1830 unbroken, so you might just scrape in

- but could possibly even be early Victorian.
Probably lead glass, and a quick flick should give the answer. Not sure which books you have, but Bickerton's "Eighteenth Century English Drinking Glasses is good, and covers most forms to the end of the Regency.
Will put my neck on the block and say that don't think this bowl shape plus stem and engraving is British pre 1760 (George II).............. both bowl and stem look to be too simple, but that just my opinion.
Otherwise nice glass, and at charity shop prices bound to be a bargain.
