Rare Georgian Double Series Mercury Twist Wine Glass c1750

Description

Heading : A Double Series Mercury Twist Wine Glass
Period : George II – George III
Origin : England 
Colour : Clear 
Bowl : Bucket shape
Stem : A pair of mercury twist spiral cables outisise a vertical core
Foot : Conical
Pontil : Snapped
Glass Type : Lead 
Size :  15.0cm height.  5.1cm diameter bowl. 6.4cm diameter foot 
Condition : Excellent. no chips or cracks 
Restoration : None 
Weight: 128 grams 

Only the fourth example of a mercury twist wine glass with a bucket bowl and the first with a double series stem.