Lot · Other Antique Science, Medical
Signal Electric 150 OHM Landline Telegraph Mainline Relay Signal Amplifier 1920s
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Sun · Jun 14, 2026
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ZIP 282**
hmalkoff3
9,065 ratings · 100.00% positive
Description
From the sellerDating from the 1920s it appears to be in original condition with wear as pictured. It looks complete and even the fragile coil spring is still connected. It is composed of solid brass on a wood block mounted on a wrought iron screw-down mounting base.
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