Round light measures approximately 6.5" tall (9" with base) x 8" in diameter, with a 4" fitter.  No identifying markings noted.

CONDITION:  Pre-owned; untested.  The shade is in good shape, but the chrome base is heavily corroded inside (please see last photo) and has some white paint around the top rim.  One of the base screws is also different from the others.  Offered "as is".