McVitie Weston valve collection, Triotron valve, type P225
- maker:
- Radiowerk E Schrack
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Triotron valve, type P225, pinch marked 1312, P-225, glass loose, 4-pin brown moulded base with side terminal, (RMW/Y10 - McVitie Weston number), by Radiowerk E. Schrack.
