Exhibit Antiques has dated this piece to the Georgian era.
A fine 18th century Beilby enamelled opaque twist wine glass, dating to circa 1765. It features a round funnel bowl decorated with white enamelled fruiting vine around the rim.

A very well balanaced example with superb intact workmanship.
Historical Context
The Beilby family were a group of 18th-century craftsmen working in Newcastle and Sunderland, best known for decorating glass with fine enamel. The key figure, William Beilby, specialised in painting delicate designs, most commonly white enamel fruiting vines, onto existing glass made by local factories. Their work is among the earliest important examples of English enamelled glass and represents a shift from purely functional objects to decorative art

If you wish to see more from the Dr Rigby Collection, comprising over 100 fine 18th-century wine glasses; please use the link below.
The Dr Rigby Collection of fine 18th century wine glasses
Date & Origin

England, c1760. Period of King George III.
Condition
Excellent. No chips, cracks or restoration. The enamelling is in excellent condition.
Dimensions
Height: 14.6cm
Rim diameter: 5.1cm
Foot diameter: 7cm
Weight: 132 grams
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