Exhibit Antiques has dated this piece to the Georgian era.
Sits on a true mercury twist stem with a conical foot.
Comments
An exceptionally rare glass and the first engraved pan top mercury twist we had had in over 20 years.

The foot has had a polish at somepoint in the past and we have taken that into consideration, however, the rarity of the form is outstanding and you won't find another example on line.
Date & Origin
England, c1760. Period of George III.
Condition
No chips cracks or restoration, the foot rim has had a polish.
Dimensions
Height: 14.6 cm
Rim diameter: 5.2 cm Foot diameter: 6.2cm
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