This is a signature model by ka-yu (ex. Janne Da Arc). I purchased it at an auction about 10 years ago, and it has been stored at my parents' house since then, with almost no use. I have confirmed that it produces sound, but I think maintenance is necessary, so I am selling it as a junk item. I plan to ship it in a Fernandes case, wrapped in cardboard. Since it will be shipped from my parents' house, it will take about a week.