NOS Sylvania 6HB7 Vacuum Tube - White Box - Tested

Sylvania Electronic Vacuum Tube 6GF7 - NOS with original Box ~ Tested

6CS7 Sylvania Dual Triode Vacuum Tube - NOS - TESTED

Various 6BC7 (RCA/GE/Sylvania/NU) Electronic (Vacuum) Tube (NOS) Generic Box

SYLVANIA 6BC7 Vintage Electronic Vacuum Tube - NOS - New Old Stock Tested

Sylvania NOS/NIB 6J7G vacuum tube tested & guaranteed

Sylvania 6DN7 Electronic Vacuum Tube - NOS - Tested

Sylvania 6EH7 EF183 Vacuum Tubes Tested NOS Lot Of 4 +Box