McVitie Weston valve collection, Triotron valve, type SD2
- maker:
- Radiowerk E Schrack
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Triotron valve, type SD2, marked 0490, glass envelope loose
Science Museum Group
© The Board of Trustees of the Science Museum
Triotron valve, type SD2, marked 0490, glass envelope loose, (RMW/E37 - McVitie Weston number), by Radiowerk E. Schrack.
