McVitie Weston valve collection, GEC/Osram valve, type CF.1
- maker:
- Osram and General Electric Company Limited
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GEC/Osram valve, type CF.1, hemispherical glass envelope 2in diam with two side tubes for electrodes, and 2 evacuating pips, (RMW/P29 - McVitie Weston number), by Osram; General Electric Company Limited.
