One glass x-ray rectifier tube, French pattern, by A. Gaiffe, Paris, 1900-1910 owned by Dr. A. Bruce, Edinburgh, 1900-1910 One glass x-ray rectifier tube 1900-1910
One glass x-ray rectifier tube, French pattern, by A. Gaiffe, Paris, 1900-1910 owned by Dr. A. Bruce, Edinburgh, 1900-1910 One glass x-ray rectifier tube 1900-1910