This is an excellent example of an early 19th century, English, hand blown, Bristol green wine drinking glass which we date to the George 111rd Regency period, circa 1815.
This glass has an elegant bell shaped bowl with a bladed shoulder knop over a solid stem having a true baluster knop above a flattened basal knop. The stem sits on a plain foot with a good snapped-off pontil mark to the base, evidencing the hand blowing process.
The glass is a nice shade of Bristol green
Dimensions in inches:
Bowl diameter 2.57
Foot diameter 2.5
Height 5
We date this glass to the early years of the 19th century, circa 1810-1820.