McVitie Weston valve collection, Westinghouse Radiotron valve, type VU71
Westinghouse Radiotron valve, type VU71, marked N.U.17, (RMW/Y449B - McVitie Weston number), by Westinghouse Cooper Hewitt Co..
Westinghouse Radiotron valve, type VU71, marked N.U.17, (RMW/Y449B - McVitie Weston number), by Westinghouse Cooper Hewitt Co..