McVitie Weston valve collection
- Made:
- 1931 in United States and Canada
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LicenseMazda output triode valve, type AC/P1, B5 base
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Mazda output triode valve, type AC/P1, B5 base, pinch marked P1829, marked 'DUMMY', (RMW/F34 - McVitie Weston number), by British Thomson-Houston Company Limited, 1931.
