Vacuum tube 50C5 HITACHI (Hitachi) MT7 pin 1 piece This item has been stored for a long time. It was stored after being tested in a working device. The heater continuity was re-confirmed for this listing. There is dirt on the exterior. The dirt can be wiped off, but in the case of old vacuum tubes, the printing easily disappears, so I haven't wiped it off. It will be shipped in its original box and then in a plastic case. #Vacuum tube #MT tube #50C5 Management number v035