Exhibit Antiques has dated this piece to the 1750s.
A rare opaque twist wine glass dating to c1760.
It has a large Ogee bowl engraved with a cross hatched interlaced vesica band around the rim with the word FIDELITER (Latin for faithful or trustworthy) above a dexter arm vested and holding a sword with a distinctive indented or serrated back edge.
The crest is attributed to two Scottish families, Hamilton of Wishaw and Hamilton of Newton.
This will be supplied with the glass and a photograph of the letter is included below.

Sits on a double series opaque twist stem consisting of a pair of spiral tapes outside a gauze.
Probably unique, we have never come across another example of this glass.
Date & Origin
England, c1760. Period of George III.

Condition
No chips cracks or restoration
Dimensions
Height: 16.1cm Rim diameter: 6cm , Foot diameter: 7.7cm.
Comments
This glass comes from the Michael Wallis collection which took over 45 years to build and contains over 250 drinking glasses, covering all forms from the 18th century, many exceptionally rare. They will all be presented by Exhibit over the coming weeks and months
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