18th Century Pan Top Mercury Twist c1750

Description

Heading : Georgian pan topped mercury air twist wine glass
Period : George II – c1750
Origin : England
Colour : Clear. good grey tone
Bowl : Pan top. Excellent pucella marks
Stem : A pair of air “mercury” corkscrew tapes
Foot : Conical
Pontil : Snapped
Glass Type : Lead
Size :  14.9cm height. 5.5cm diameter bowl. 7cm diameter foot
Condition : Excellent. no chips or cracks
Restoration : None
Weight: 147 grams

The air “threads” within the stem are flattened. Light passing into them refracts internally giving this air twist stem a silvered appearance. hence the term mercury.