Obviously used as a goldfish bowl at some point by the amount of water tide marks and staining from the rim down and took a good hour to polish back, one of my recent favourite finds for a pound and i can not find anything similar, i'm rough guessing it might be 1920's due to the sharp cuts which look not to have been acid polished.
It's very heavy, 2.2kg and the glass is 10 mm thick. The base has worn through a lot of the polished surface.
7 inches in diameter and height.
Regards Chris.