McVitie Weston valve collection, Radiola valve, type GDER
Radiola valve, type GDER, (RMW/Y40 - McVitie Weston number), by SRA Svenska (Svenskradio) Radioaktiebolaget.
Radiola valve, type GDER, (RMW/Y40 - McVitie Weston number), by SRA Svenska (Svenskradio) Radioaktiebolaget.