6BX7GT NOS Sylvania amplifier electron radio audio vacuum tube tested 6BX7

1ea Sylvania 12AZ7A vacuum tube. NOS. Double Triode.

(1) Tested Sylvania 6BX7GT Tube Date Code ii YKD Twin Triode Tube Black Plates

1ea Sylvania 12DT8 Vacuum Tube. NOS, NIB, USA, Double Triode

GE 6BX7GT Vacuum Tube NOS Dual Triode Vintage Audio Amplifier USA

1ea GE 6BX7GT, 6BX7, Vacuum Tube. Made in USA. Tests Strong. See Pics.

1ea Sylvania 6AN8A Vacuum Tube. USA, NOS, NIB, Triode-Pentode

1ea Delco/GM 12BH7A Vacuum Tube. NOS.NIB. USA. Double Triode