Mobile electrocardiograph machine used at the Royal Postgraduate Medical School, made by the Cambridge Instrument Co. Ltd., Cambridge and London, 1930-1934 Mobile electrocardiograph machine used at the Royal Postgraduate Medical School 1930-1934
"CDX" X-ray machine, wall-mounted model, by the Victor X-ray Corporation, USA, 1923-1928 "CDX" X-ray machine 1923-1928
