(1) Tested Sylvania 12CU5 12C5 Tube with Box Date Code ef ABF 12CU5 Tube 12C5

NOS Sylvania 12C5 Vacuum Tube - White box - Tested

4BQ7A Sylvania NOS Vacuum Tube. Gm Tested. With Box

12V6 sylvania NOS Vacuum Tube. Gm Tested. With Box

6GU7 Sylvania NOS Vacuum Tube. Gm Tested. With Box

6HS8 Sylvania NOS Vacuum Tube. Gm Tested. With Box

12AL5 NOS Vacuum Tube. Gm Tested. With Box

Vtg Tested Strong Sylvania 12C5/12CU5 Radio Amplifier Black Plate Vacuum Tube