Sylvania 31JS6C vacuum tube NOS

Vintage Sylvania Compactron 31JS6C Vacuum Tube Tested

31JS6C~TUBE~NOS~AMPLIFIER~VALVE~SHORT WAVE~HAM~RADIO~

Vintage NOS NIB Raytheon 31JS6C Radio Audio Amplifier Vacuum Tubes

Vintage NOS NIB Raytheon 31JS6C Radio Audio Amplifier Vacuum Tube

NOS SYLVANIA 31JS6C VINTAGE TUBE - NIB NEVER IN SERVICE (786)

GE 31LQ6 Vacuum Tube NOS Original Box Tested

31JS6C GE Vacuum tube - NOS/NIB - Tested GOOD on Hickok 539B w/CA-4