Exhibit Antiques has dated this piece to the 1750s.
An excellent 18th century glass tumbler dating to c1760.
Tapered form with a snapped pontil. A really nice plain example and would work well with a good few measures of Scottish Whisky.
..moulding, engraving, enamelled, gilded or a combination. Its actually quite rare to find a 'plain' example, which personally I like.

Date & Origin
England or Scotland, c1760. Period of George III.
Condition
Excellent, age-related wear as shown. No chips cracks or restoration.
Dimensions
Height: 12.7cm
Rim diameter: 9.7cm
Base diameter: 7.2cm.
Historical Context
On Oct 25 1760, George III succeeds to the throne as King of Great Britain and Ireland. He was the first Georgian King to be born in England and use English as his first language.
Exhibit Antiques has dated this piece to the 1750s.
Specialists in 18th & 19th century antique glass
You can view the stock and full dealer information on the Exhibit Antiques Profile Page