Exhibit Antiques has dated this piece to the 1750s.
Rests upon a double series opaque twist stem consisting of a pair of corkscrews outside a pair of spiral tapes. Conical foot with a snapped pontil.

Date & Origin
England, c1760. Period of George III.
Condition
Excellent, no chips cracks or restoration
Dimensions
Height: 13.8cm Rim diameter: 4.5cm Foot diameter: 6.8cm
Historical Relevance
March 20th, 1760, the 'Great' Fire of Boston destroyed 349 buildings and the 'Great' Comet named C/1760 A1 approached Earth within 0.0682 AUs.
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