My grandfather used this. It seems to have been handled with care, but details and operation are unknown. Thank you for your understanding. I am also listing other audio parts (transformers, vacuum tubes, etc.), so please take a look. ※Everything in the photos is included. Please confirm before purchasing. ※Usually, I can ship the same day, but I travel frequently, so please contact me if you are in a hurry. ※Operation is unknown. No claims and no returns, please. #LEADER #リーダー #AUDIO GENERATOR #オーディオ