'Centralix' dental x-ray equipment, oil immersed head unit containing transformer and x-ray tube, type no. 11251/03 no. N447020, by Philips, 1930-1939.
'Centralix' dental x-ray equipment, oil immersed head unit containing transformer and x-ray tube, type no. 11251/03 no. N447020, by Philips, 1930-1939.