McVitie Weston valve collection, Marconi valve, type VP21
- c. 1932
- Marconi Company Limited
Marconi valve, type VP21, glass envelope loose, (RMW/Y214 - McVitie Weston number), by Marconi Company Limited, c. 1932.
- Electronic Components
- Object Number:
- STC plc
- Permanent collection
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