Mullard Magic: For All Your Vintage Valve and Radio Needs!
5Z3, NATIONAL UNION, VT-145, BLACK BASE, CHARCOAL SMOOTH ANODES, US NAVY, OCTOBER 1943 PRODUCTION
5Z3, RCA, VT-145, BLACK BASE, CHARCOAL SMOOTH ANODES, US NAVY, OCTOBER 1943 PRODUCTION
SYLVANIA 5Z3 BLACK BASE 5 RIB CHARCOAL ANODES JAN 1959