Cathode Ray Tube

Other electrical glassware in my collection. This is a recent acquisition adding to a number of Cathode Ray Tubes which I have had an interest in since 8 or 9 years old, (long story). This is an interesting CRT as it is marked ‘experimental’. On the down side that means there is little information on it, but it is a standard format for WWII radar display tubes. Only differences I has spotted are the external connections, on the neck, for the X/Y plates and a blue medium persistence phosphor screen.