McVitie Weston valve collection
- Made:
- United States and Canada
- maker:
- Mullard Limited
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LicenseMullard triode valve, type PMO, B4 base, marked RM167
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Mullard triode valve, type PMO, B4 base, marked RM167, (RMW/D36 - McVitie Weston number), by Mullard Limited.
