transformer with bar through it. manufactured by Edison Swan United Electric Light Co, Manchester Transformer with Bar
Pointolite high intensity microscope lamp, by W. R. Prior and Co (Bishops Stortford, Herts), Santon Ltd and Edison Swan Electric Light Co., 155 Charing Cross Road, London, WC2, England, 1950-70. Pointolite high intensity microscope lamp 1950-1970