Cossor valve, type X.124, marked X124 C VA Co Tung with mano 5in screen 1ft 4in long overall, with manometer triode as side tube, (RMW/K40 - McVitie Weston number), by A C Cossor Limited, 1933.
Cossor valve, type X.124, marked X124 C VA Co Tung with mano 5in screen 1ft 4in long overall, with manometer triode as side tube, (RMW/K40 - McVitie Weston number), by A C Cossor Limited, 1933.