Hand-thrown pottery electric lamp

Lamp body measures 16 inches tall and is about 8 inches wide. It is signed on the bottom.

Signature reads: S Lewis 1968. It is comprised of three parts: base , body, and crown?

I m not sure of the correct term, but it has a small light bulb inside the body as well as a socket on top for a normal bulb. It can alternate between both lights on or off  separately. 

One of the bulbs inside does not light up.

 No lampshades were included.

I consider the condition excellent despite a repair that was made by the maker before the glaze was added.

Thank you in advance for your help!

Good