Cossor valve, type X.263, red paper label marked J, 5in screen, tube 1ft 5in long overall, with one side tube for second anode, (RMW/K42 - McVitie Weston number), by A C Cossor Limited, 1934.
Cossor valve, type X.263, red paper label marked J, 5in screen, tube 1ft 5in long overall, with one side tube for second anode, (RMW/K42 - McVitie Weston number), by A C Cossor Limited, 1934.