found this wonderful pair today.
They stand around 12" tall and weigh 1.7kg each.
The top edge is finished (see photo 2) in a similar way to a Stevens and Williams art deco vase on p146 of 20th Century British Glass by Hajdamach. Other than that I don't have much to go on, apart from a wide, highly polished pontil (photo 3) and a colour match to some amber Stuart crystal I have.
You thoughts are appreciated.