McVitie Weston valve collection, Dario Super valve, type H.F. I.H.
Dario Super valve, type H.F. I.H., pinch marked 100233, (RMW/F82 - McVitie Weston number), by Societe Francaise Radioelectrique.
Dario Super valve, type H.F. I.H., pinch marked 100233, (RMW/F82 - McVitie Weston number), by Societe Francaise Radioelectrique.