McVitie Weston valve collection, Tungsram valve, type TIM4
Tungsram valve, type TIM4, labelled K/TIM4, 1519, M1 372, metallising partly removed, (RMW/H47 - McVitie Weston number), by Tungsram Electric Lamp Works (Gt. Britain) Ltd..
Tungsram valve, type TIM4, labelled K/TIM4, 1519, M1 372, metallising partly removed, (RMW/H47 - McVitie Weston number), by Tungsram Electric Lamp Works (Gt. Britain) Ltd..