Double Series Mercury Twist With Hammer Moulded Bowl c1750

Heading : Double series mercury twist stem wine glass
Period : George II – c1750
Origin : England 
Colour : Clear 
Bowl : Ogee with hammer moulding.
Stem : Double series mercury twist – a pair of spiral tapes outside a ten-ply mercury corkscrew. 
Foot : Conical 
Pontil : Snapped 
Glass Type : Lead 
Size : 15.2 cm height. 5.8cm diameter bowl. 6.7cm diameter foot 
Condition : Excellent. no chips or cracks 
Restoration : None 
Weight: 126 grams