McVitie Weston valve collection, Von Ardenne valve
- Made:
- circa 1931
- maker:
- Manfred von Ardenne
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Von Ardenne valve, marked 546, 5.5in diam screen, length 1ft 6in overall, (RMW/K27 - McVitie Weston number), by Ardenne, Manfred von, c. 1931.
