McVitie Weston valve collection, Kathodenroehren valve, type 0N7
- Made:
- 1918
- maker:
- Kathodenroehren GmbH
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Kathodenroehren valve, type 0N7, red band round metal and black moulded 4-pin base, pinch marked 0N7 2,72.35 P1.6 1554 30/12, glass electrode supports broken, (RMW/J4 - McVitie Weston number), by Kathodenroehren G.m.b.H., 1918.
