The World is Made of Glass Ltd. has dated this piece to the 18th Century.
The items are in excellent condition for their age. They show age related wear and tear to the rims of the feet consistent with some 200 years of use. They have rough pontil marks on the undersides of the feet.

The bowl measures 11.4 cm (4.5 inches) in diameter at the rim. The bowl is plain and sits on a short stem and a domed and folded foot which measures 8.7 cm (3.5 inches) in diameter. The bowl is 13.5 cm (5.4 inches) in height. There is a tiny dark inclusions in the metal of the upper side of the foot dating from manufacture. There are no chips, cracks, other significant scratches or any obvious evidence of restoration.
Lead glass, collectively weighing in at 545 g. (~ 1 lb. 3 oz.).
The World is Made of Glass Ltd. has dated this piece to the 18th Century.
Dealing in antique and collectable glass from the 17th to the 21st century.
You can view the stock and full dealer information on the The World is Made of Glass Ltd. Profile Page