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
Collection of glass slides documenting the history of Watson and Sons (Electro-Medical) Ltd. and other constituent companies of Picker International Ltd., c.1925-1960 training of radiographers Slides documenting Watson and Sons (Electro-Medical) Ltd. 1925-1969
