Exhibit Antiques has dated this piece to the Georgian era.
A fine 18th-century air twist wine glass dating to c1750. It has a large bell bowl with a solid section at the base. Sits on a multi spiral air twist stem above a conical foot. Three part multi spiral air twists are rare and this is a very fine example.

Identification of Antique Drinking Glasses | The English Air Twist
Date & Origin
England, c1750. Period of George II.
Condition
Excellent, no chips cracks or restoration
Dimensions
Height: 17.2cm
Rim diameter: 7cm
Foot diameter: 7.8cm
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