McVitie Weston valve collection, Lissen Diode-Pentode valve
Lissen Diode-Pentode valve, 5-pin black moulded base with two side terminals and top terminal, all terminal nuts missing, (RMW/Y61 - McVitie Weston number), by Lissen Limited.
Lissen Diode-Pentode valve, 5-pin black moulded base with two side terminals and top terminal, all terminal nuts missing, (RMW/Y61 - McVitie Weston number), by Lissen Limited.