McVitie Weston valve collection
- Made:
- 1940
- maker:
- Mullard Limited
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LicenseMullard tuning indicator valve, type TV4A, Ct8 base, marked 977
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Mullard tuning indicator valve, type TV4A, Ct8 base, marked 977.1 1BV, (RMW/Y213 - McVitie Weston number), by Mullard Limited, 1940.
