1930's or 40's lamp base

This lovely pottery / ceramic lamp base does not appear to have ever been made into a lamp. It has a whole on the top and at the bottom for the wiring. I would love to identify the maker. It is that awesome greenish turquoise color from the very early 1900's. My guess was 1930's or 1940's. It is unglazed on the inside and bottom. It stands 14 inches tall by about 5 1/2 inches at the base. Any feedback would be really appreciated !