Exhibit Antiques has dated this piece to the Georgian era.
England, c1820. Period of George III.
Condition
Excellent, age-related wear as shown.
Dimensions
Height: 12.7 Bowl diameter: 8cm Foot diameter: 7.5cm.
Weight
288 grams
Technical Description
An excellent Georgian glass rummer with an incurved bucket bowl with slice cuts. Annular knop above conical foot with polished pontil.

Historical Relevance
The Radical War or also known as the Scottish Insurrection of 1820, was a week of strikes and unrest, a culmination of Radical demands for reform in the United Kingdom of Great Britain and Ireland which had become prominent in the early years of the French Revolution, but had then been repressed during the long Napoleonic Wars.
An economic downturn after the wars ended brought increasing unrest. Artisan workers, particularly weavers in Scotland, sought action to reform an uncaring government.
Exhibit Antiques has dated this piece to the Georgian era.
Specialists in 18th & 19th century antique glass
You can view the stock and full dealer information on the Exhibit Antiques Profile Page