Vintage 3-Way Turn Knob Lamp Socket with Solid Metal Cast Shell, E26 Medium Base - royalLAMPSHADES
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Historic Houseparts, Inc. > Metal Shell Sockets and Parts > Heavy Turned Solid Brass Lamp Socket with 3-Way Interior & Turn Knob - No UNO Thread-Polished & Lacquered Brass
Antique Brass Lamp Holder | Edison Medium (E26) Base
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Historic Houseparts, Inc. > Metal Shell Sockets and Parts > Heavy Turned Solid Brass Lamp Socket with Keyless Interior - No UNO Thread