McVitie Weston valve collection, Dario valve, type 303M
Dario valve, type 303M, pinch marked N-17, (RMW/G18B - McVitie Weston number), by Societe Francaise Radioelectrique.
Dario valve, type 303M, pinch marked N-17, (RMW/G18B - McVitie Weston number), by Societe Francaise Radioelectrique.