McVitie Weston valve collection, Tungsram valve, type PP610
Tungsram valve, type PP610, marked U034, series 100mA, (RMW/Y18 - McVitie Weston number), by Tungsram Electric Lamp Works (Gt. Britain) Ltd..
Tungsram valve, type PP610, marked U034, series 100mA, (RMW/Y18 - McVitie Weston number), by Tungsram Electric Lamp Works (Gt. Britain) Ltd..