Mazradia E4M triode valve, large horned type, 4-pin base with grid pattern removed, pinch marked 4 18, made by the British Thomson-Houston Company Limited, Rugby, England, 1910-1960. McVitie Weston number = RMW/J124
- Electronic Components
- Object Number:
- thermionic valve
- component - object
- Donated by STC plc
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