McVitie Weston valve collection, Braun-Wehnelt tube valve
- Made:
- 1906
- maker:
- Unknown
Braun-Wehnelt tube valve, bulb ended glass envelope 1ft 3.5in long overall, with 6 side tubes - 1 cathode 1 anode, 4 deflector plates - tape filament defective, (RMW/K20 - McVitie Weston number), by Unknown maker, 1906.
