McVitie Weston valve collection
- Made:
- 1930 in United States and Canada
- maker:
- Cossor and Watson Limited and A C Cossor Limited
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Cossor detector triode, type 210 DET, B4 base, with purple printed label and metallized glass envelope (RMW/D15 - McVitie Weston number), by A C Cossor Limited, 1930.
