VACUUM TUBE ~ 17AX4 / 17DM4A ~ SYLVANIA ~ NOS ~ 17AX4

Vtg Sylvania 6AX4GTB Vacuum Electron Tube Tested Good Original Box NR

NOS Sylvania 17AX4GTA Vacuum Tube - White Box - Tested

Sylvania 6AX4GTB 6AX4GT Grey Plate Vacuum Tube NOS NIB TV7 Tested ☀️

2- Vintage NOS Sylvania & Sears 17DW4 Vacuum Tubes

Sylvania NOS 17AX4GTA Vacuum Tube Tested

Vtg Matched Pr. NOS NIB Sylvania 6AX4GTB Amplifier Audio Coin Base Vacuum Tubes

Sylvania NOS 17D4 Vacuum Tube Tested