Preowned Dynatron Model MD- 300VM manufactured in Japan. Vintage headphones in very good condition. Everything appears complete, except the jack sheeting is broken and needs replaced. It functions, but needs fixed. I could only find a crappy old stereo ( radio, not vinyl) system to test these on. Both sides work, I couldn’t tell quality. See photos for condition. If you need more photos just ask! Estate find, currently in a pet free, smoke free home.