A tall base for an electric lamp in the form of a kerosene lamp, this piece is in the English Hobnail pattern by Westmoreland. It is Kovar number EH-174.
It's 9.75" tall overall (glass element is 9" tall).
Condition: the electric socket is missing but could easily be replaced. The brass cap is set on with plaster in addition to screwing on. Glass and metal parts are both fine, no wear or damage.
Item ID: 2788