Vintage MCM 1950's Round Circular Fluorescent Bulb Ceiling Light Fixture Metal

Description

Vintage 1950's-1960's Mid Century Modern Circular Fluorescent Bulb Ceiling Light Fixture White Metal
UNTESTED. I do not know if this works. The wiring on the inside looks old and the plug wire is cracked so you need to replace that. This if the light fixture only. We do not have the round bulb for it.
I believe this would have held a round fluorescent light bulb on the outside of this fixture where those 3 clear plastic pieces are. 2 of them have a spring in which the spring does work (photo 5 & 12) and the other one (photo 4) has an outlet type piece in it where I assume the light bulb plugs into. The large white round circular ribbed frame is made of some kind of metal. A magnet DOES attract to it. There are a few light surface scratches on it and a slight indentation at the edge (photo 3 & 6 lower left area).
Measures 13" in diameter x 6 3/4" tall. Weighs 4 pounds 8 ounces (prior to packaging)
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We buy most of our pieces at auctions, flea markets & yard sales so we may not know the history of the item. We are not antique dealers, collectors or experts.  We describe the item along with any flaws and markings we can find the best we can.
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