It was listed by Exhibit Antiques. Sold pieces stay on Sellingantiques as a record of what has passed through, and the next one is rarely far away.
Exhibit Antiques has dated this piece to the Victorian era.
A flat green foot with a polished pontil.

Date & Origin
England, Period of Victoria, c1850.
Condition
Excellent, no chips, cracks, or restoration. A couple of very small nibbles to the wear line of the foot, which are quite insignificant.
Weight
165 grams

Dimensions
Height:15.5cm Bowl Diameter:6.9cm Foot Diameter:6.9cm
Comments
Dating this glass accurately is quite difficult with some features indicating an early 19th-century date and some slightly later. What can be said is that a green bowl on a white opaque twist stem with a green foot is just about as rare as they come with very few examples in existence.
Taking everything into consideration 1830 is fair...it could be as early as 1800 and as late as 1850 but I don't think it really matters as it an exceptional glass.
Exhibit Antiques has dated this piece to the Victorian era.
Specialists in 18th & 19th century antique glass
You can view the stock and full dealer information on the Exhibit Antiques Profile Page