Vacuum tube 6GW8 National (Matsushita Electric) MT9 pin 2 tubes These have been stored for a long time. They were confirmed to be working in operating equipment and then stored. The heater continuity was re-confirmed before listing. There is some dirt on the exterior. Since they are made of glass, the dirt can be wiped off, but in the case of old vacuum tubes, the printing easily disappears, so I have not wiped them. There is no original box. They will be wrapped in bubble wrap and shipped in a plastic case. #Vacuum tube #MT tube #6GW8 Management numbers: V030, V031