SYLVANIA - NOS 6CB6A Electronic Tube - Tested STRONG

6DQ6A 6GW6 NOS Philco Radio Audio Amplifier Vacuum Tube Tested Strong

SYLVANIA - NOS 6JT8 Electronic Tube - Tested STRONG

DUMONT 17DQ6B - 17GW6 - Beam Power Ham Radio Vacuum Tube - NOS - Tested

SYLVANIA - NOS 6HB7 Electronic Tube - Tested STRONG

RCA - NOS 3DT6 Electronic Tube - Tested STRONG

SYLVANIA - NOS 6GF7 Electronic Tube - Tested STRONG

DELCO - NOS 6FH5 Electronic Tube - Tested STRONG