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Specimen of a 3 wire armoured cable, supposed to have been used at the 1851 Exhibition.
Specimen of a 3 wire armoured cable, supposed to have been used at the 1851 Exhibition. The conductors consist of three large solid copper rods embedded in insulating material, the whole being protected by a heavy outer sheath.
Single stranded conductor from a specimen of a 3 wire armoured cable, supposed to have been used at the 1851 Exhibition.
