Six copper half-tone blocks used in printing catalogues of x-ray equipment by A.E. Dean and Company Ltd., 1920-1940 Six copper half-tone blocks used in printing catalogues of x-ray equipment by A.E 1930-1950
Battery, 10 electric cells, in wooden frame, made by Baird and Tatlock, London, English, 1870-1910 Battery, 10 electric cells 1870-1910
