Smaller specimen of the London to Birmingham co-axial cable laid by the British Post Office in 1935-36, the first long distance co-axial cable in Britain. Specimen of London-Birmingham co-axial cable, 1935-1936 1935-1936
Larger specimen of the London to Birmingham co-axial cable laid by the British Post Office in 1935-36, the first long distance co-axial cable in Britain. Specimen of London-Birmingham co-axial cable, 1935-1936 1935-1936
Fibre optic cable, from piece of barbed steel 'Sabretape', used as the basic component of a perimeter fence alarm system, made by Pilkington Security Equipment ltd., Denbigh, Wales, 1985 Fibre optic cable 1985