Sample or Telegraph Cable for Mines, Copper wire of seven wires in a thick insulating layer of a black plastic., anonymous, unknown, 1865 - 1875, copper (metal), l 5.4 cm × d 1.9 cm
Keywords:
Sample, Telegraph Cable, Mines, Copper wire, seven wires, thick insulating layer, black plastic, unknown, 1865, 1875, copper, metal, l 5 4
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