Only sold on Mercari. It's an old item. New and unused. I don't have much knowledge about it, so I can't explain it. I also cannot guarantee its operation. The storage condition is good. Please check the product in the photos. One of them has a dirty glass part. We are waiting for purchases from those who understand. Multiple purchase discount available If you purchase multiple items on sale and they can be shipped together, we will offer a discount. Please leave a comment. If you press the purchase button first, the discount will not be applied due to Mercari's system. #Vacuum tube #6AL5 #Toshiba #Hitachi #Audio #GENERALELECTRIC #FUJITSU #NEC