VINTAGE NOS RAYTHEON 6AX4GTB VACUUM TUBE TUBES USA TESTED TUB13105

(1) Tested Truetone 6AX4GTB Tube with Box Date Code 6535 6AX4 GTB Rectifier

Raytheon 6AX4GT/B 6AX4 Vacuum Tube Made In Japan NOS +Box

NOS ZENITH Radiotronic 6AU4-GTA New in Box Diode tube Tested Excellent

(1) Tested RCA 6AX4GTB Tube with Box Code DW Coin Base RCA 6AX4 GTB Rectifier

(1) Tested Lindal 6AX4GTB Tube & Box Date Code 9J Japan 6AX4 GTB Rectifier Tube

(1) Tested Raytheon 6AX4GTB Tube & Box Date Code J-22 Japan 6AX4 GTB Rectifier

(1) Tested Raytheon 6AX4GTB Tube with Box Code J-22 Japan 6AX4 GTB Rectifier (b)