McVitie Weston valve collection, E.E.C. valve, type Dextraudion
E.E.C. valve, type Dextraudion, black paper label, (RMW/E91 - McVitie Weston number), by Economic Electric Ltd..
E.E.C. valve, type Dextraudion, black paper label, (RMW/E91 - McVitie Weston number), by Economic Electric Ltd..