LIGHT bulb socket standard porcelain vintage old knob & tube 1900
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Location:Keego Harbor, Michigan,
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Item:252632325618Vintage old light bulb base from the era of knob and tube wiring in the early 1900's. * Porcelain socket. * It was made in the USA. *The bottom is marked 660w 250v. *The base is 1 7/8” square and 1 5/8” deep or 2 1/2” across the ears.Material: Porcelain