Exhibit Antiques has dated this piece to the 1750s.
A very fine example of an 18th-century Balustroid wine glass dating to c1740.
It has a round funnel bowl engraved with a single bunch of grapes with a vine leaf on either side. A Jay bird looking to the rear is on the reverse.
High conical folded foot.

Comments
You won't find this particular balustriod form very often. A well constructed example, the engravings are almost certainly of Jacobite significance and sympathy with the grapes and two vine leaves replacing the rose and two buds alongside the Jay which is purported to be a symbol of the usurpation of the Stuart Kings.

The combination of form and engravings are rare.
Date & Origin
England, c1740. Period of George II.
Condition
Excellent, age-related wear as shown.
Dimensions
Height: 14.7cm Rim diameter: 5cm Foot diameter: 6.8cm.
Historical Relevance
Hand-made around the time Grog was first issued to the Royal Navy in 1740.
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