(2) Silvertone/Zenith 1B3GT/1G3GT Vacuum Tubes Tested

Type 6K7G Zenith radio audio electron vacuum 3 tubes valves tested ST 6K7GT 6K7

VACUUM TUBE ~ 1G3GTA / 1B3GT ~ ZENITH ~ NOS ~ 1G3GTA / 1B3GT

LOT OF 3 VINTAGE VACUUM TUBES-6H6 GT RAY THEON-6MJ8 ZENITH-6BA11-ZENITH-TESTED

3- Vintage NOS RCA Zenith Westinghouse 1K3 Vacuum Tubes

Zenith 17AX3 Radionic Vacuum Tube NOS TESTED @ 92% on B&K 700 tester Made in USA

(3) Tested 6GK5 GE Zenith Vacuum Tube Lot Vintage Radio

Zenith 19CG3 Vacuum Tube NOS w/box TESTED @ 104% on B&K 700 Tester Made in USA