Heading : Incised twist stem Georgian wine glass
Period : George II / George III - c1755
Origin : England 
Colour : Clear
Bowl : Round funnel with hammer moulding  
Stem : Incised twist 
Foot : Domed
Pontil : Snapped
Glass Type : Lead
Size :  15.9cm height, 7cm diameter bowl, 7.4cm diameter foot
Condition : Very good
Restoration : A 3mm long and 2mm wide flake chip on the foot rim has been filled with epoxy resin. This is constructive restoration.
Weight:  160 grams 

The restoration can just be observed at "twenty past" in the macro image of the underside of the foot. Incised twists do nor pass through our hands very often, just thirty, and  of these the majority were continental lead free glass.

References :

English, Scottish & Irish Table Glass by G. Bernard Hughes Pg. 106