McVitie Weston valve collection
- Made:
- 1937
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LicenseMazda triode hexode frequency changer valve, type AC/TH/1
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Mazda triode hexode frequency changer valve, type AC/TH/1, B7+tc base, marked 'DUMMY', one pin clipped, (RMW/Y209 - McVitie Weston number), by British Thomson-Houston Company Limited, 1937.
