Two Samples of Telegraph Cable for Mines, Two samples with a core of seven copper wires in a thick insulating layer of black plastic and paper., anonymous, unknown, 1865 - 1875, copper (metal), paper, (1): l 5.4 cm × d 1.9 cm (2): l 11 cm × d 1.05 cm
Keywords:
Two Samples, Telegraph Cable, Mines, Two samples, core, seven copper wires, thick insulating layer, black plastic, paper, unknown, 1865, 1875, copper, metal, 1, l 5 4
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