Jacobite Engraved Opaque Twist Wine Glass c1760

Heading : A Jacobite engraved Georgian wine glass c1760
Period : George II / George III – c1760
Origin : England 
Colour : Clear
Bowl : Round funnel engraved with Jacobite rose. one opening and one closed bud with a moth. 
Stem : Double series opaque twist with medial swelling knop
Stem Features : Central swelling knop. A pair of spiral tapes outwith a pair of corkscrew threads 
Foot : Conical
Pontil : Snapped
Glass Type : Lead
Size :  15.1cm height. 5.6cm diameter bowl. 6.8cm diameter foot.
Condition : A small black inclusion within the stem. Small particles of clinker within the bowl. There is a fleabite chip on the underside of the footrim in the wear line. this is difficult to observe.
Restoration : None 
Weight: 164 grams

Most probably engraver C according to Seddon

References :           

The Jacobites and their Drinking Glasses By Geoffrey B. Seddon – Page 79 Plate 25 & Page 86 Plates 16 & 17.

English. Scottish & Irish Table Glass By G. Bernard Hughes – Page 240 Figure 197.

The History of Glass By Dan Klein and Ward Lloyd – Page 131.

The Turnbull Collection of English 18^th Century Drinking Glasses By Martine S. Newby – Page 31.