Part Number: 12SF39 (Bearing) Part Number: 12SF5 (Ge) Part Number: 12SF5GT (No description) Part Number: 12SF7 (Electron tube) Part Number: 12SF7GT (Ne) Part Number: 12SF7-JAN (Component) Part Number: 12SF9090U (Resistor) Part Number: 12SFM20SGIPX (No description) Part Number: 12SFY (Electron tube) Part Number: 12SG615HC50MHZ (Ne) Part Number: 12SG615PHC50MHZ (Ne) Part Number: 12SG7 (Ne) Part Number: 12SG71 (Ne) Part Number: 12SG74 (No description)