(1) Tested GE 12AX4GTB Tube with Box Date Code 60-48 12AX4 GTB Rectifier

12AX4 GTB NOS Vacuum Tube. Gm Tested. With Box

12AX4 GTB NOS Electronic Vacuum Tube. Gm Tested. With Box

GE Electronic Tube 12AX4GTB NOS In Original Box ~ Tested

(1) Tested Westinghouse 12AX4GTB Tube with Box Date Code 67-52 Canada 12AX4 GTB

(1) Tested Westinghouse 12AX4GTB Tube with Box Date Code 67-09 Canada 12AX4 GTB

12AX4 Raytheon NOS Electronic Vacuum Tube. Gm Tested. With Box

GE NOS 12AX4GTB Vacuum Tube Tested