McVitie Weston valve collection, Hivac valve, type D210
- Made:
- London
- maker:
- Hivac Limited
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Hivac valve, type D210, 4-pin base, one pin clipped, anodes and shields, embossed H, pinch marked DJ15, (RMW/D79 - McVitie Weston number), made by Hivac Limited, aka the High Vacuum Valve Company, London.
